To ask you to help me to see the positives about our new house?

OP, I know it feels insurmountable at the moment, but that's just the stress of the whole situation.

Most of the things you mention are very minor. Irritating but easy to put right.

By this time next year, all the minor niggles will be fixed and you'll have a lovely house in a convenient area. And with luck, a happy baby who sleeps through.

Just take on one task at a time.

Wow everything you've listed is really minor. You're incredibly lucky to only have those few little random bits and bobs to do. This is not 'issue upon issue'. If you sell and re-buy you're MUCH more likely to have more issues at the next place and you still won't be happy. I had to replace & move my boiler, get all new carpets, change garage door handle, install new radiators, replace insulation in loft as soon as I moved in, plus tons of other random things. Everything needs redecorating. I consider these parr for the course and all part of making a home. You're probably just overwhelmed. None of this is urgent or massively expensive by the sounds of it.

sorry op do you have other stressors at the moment?
all these concerns are all very minor in the whole scheme of home ownership especially concerning you're number 1 item a handle falling off??? yes this stuff happens and home maintenance is an ongoing affair.
there are as many ways to deal with this as there are individuals.
pick one room vs cheapest fix first.
if the kitchen is satisfactory what room is adjacent to the kitchen so you can begin spreading the good stuff.
next your bedroom needs to be a peaceful haven, getting that room 100% would be my next step: fresh paint and coordinated linens.

I hated my house for the first 2 years for all the same reasons! Tips - don’t spend 2 years hating it - and doing nothing (as I did). Be realistic- you aren’t moving without incurring lots of costs - that’s phase 1! Phase 2 is to Make a full list, even down to the smallest of things, including stuff that’s been done. Split it into rooms. Phase 3 is to start ticking off what’s done. That way you’ll start to see the progress.

Garage handle fallen off.
You’ll get a new one for about a tenner.
Needs new radiators.
Why - are they leaking or just rusty and discoloured? If the latter, paint them.
Carpet - better a room with no carpet than a smelly one. What size is the room? We lived with cheapest of the cheap carpeting for years - it was indestructible!
Boiler - these things happen - maybe it just needs water topping up - get the plumber out. Boilers shouldn’t be boxed it - they need ventilation so that’s one thing off your list.
Bathroom is dated and needs re grouting. That’s a wish not a need but you can always buy tile paint if you want to or stickers in the meantime.
Roof needs attention, couple of tiles need rebedding. Couple of £100 probably (just done same and had gutters cleaned for £380.
Driveway posts are very narrow. This is a driver issue and should stand you in good stead to learn to use eyes and mirrors rather than electronics so it’s actually a good thing - remove the posts if need be.
Its all about how you’re looking at things,
big girl pants on and get shifting to have these things all sorted for your baby coming. You can do this!

You have a home. That's the positive Sorry to put a downer on it but you have your own home, that's huge.

Ok some handles are broken, you need new things and it doesn't look as nice as you'd like but you have a home, a safe place where you can lock the door.

You're really lucky. While I'm sure you had/have to work extremely hard for it (and you should be really proud of that) then main positive is, you are secure, in your very own home.

5 years is nothing in a house. Takes years to develop a home and settle in and even do the basics up a bit. But if you're planning on moving after 5 years then you will never settle in properly. Everything you do you will have the opinion well don't spend too much or invest money as it's going to be sold

Garage handle fallen off.
Can't either of you put it back on or is the area rusted?

Needs new radiators.
Why, what's wrong with them? You can get radiator paint to smarten them up if it's just that, or get them flushed or rebalanced.

Had to rip a carpet up
Go to a carpet shop and see what offcuts they have, some even offer free underlay with it.

Boiler coming up with service light despite the fact it was serviced 6 months ago.
Ask the boilerman to come back, he might have noticed something last time. Ask him about the boiler in the bedroom when he comes too.

Bathroom is dated and needs re grouting.
YouTube on how to regrout it yourself and add a link of paint to uplift it. When you say dated, do you mean avocado suite?

Roof needs attention, couple of tiles need rebedding.
?? Get a couple of quotes first. The price might surprise you. Everybody has to deal with a roofer at some point in their life.

Driveway posts are very narrow.
that just takes careful practice, or you can get one removed.
but it’s that tight to reverse on that it sets off the car sensors
? My sensors must be very sensitive then. Everytime I put mine in reverse it gets a panic attack.

Make a list, start making some phone calls or watch DIY YouTube videos, and start making your way through it. They are all normal things that everybody does at one time or another... so what is the real reason you don't like this house? Is money more tight, or are you commuting for longer, or is one of the roads extremely busy where accidents happen more, or are you and dp bickering?

I sympathise and can't promise you will grow to love this house but I think location is the most important feature. We are a couple of years into a house that we have had to spend much more on work than we expected. I feel trapped in that there are still things we need to do if we stay here but the location is not perfect. I'm worried that we overpaid and will lose money if we sell. Our last house was the most beautiful house we will ever own but eventually it was completely the wrong location. I can't find anything near big enough within budget in the right area.

I didn’t love our first house. It was an ex rental and very drab. We’d originally liked another house nearby that was lovely. Unfortunately that fell through. ( the buyer increased the price)
At first I kept comparing it to the one that fell through.
But I tell you when we sold it 4 years later we doubled our money. It was the best financial decision we’ve ever made.
You don’t have to love it just think of it as a practical place to live

The way you feel more positive about something is to... focus on the positives. you are relentlessly focusing on the negatives.

Get out a pen and paper and list all the positives. For starters, you are on the property ladder, so to speak. There is a large renovated kitchen. Your father is painting xyz. The garden has been worked on. There was something that drew you to it, so remember that and write it down.

All houses have downsides, and it is not uncommon to go through a period of realising them, fretting over them, and regretting and doubting the purchase.

It’s a stepping stone house so just needs to be liveable for 5 years.

I know this isn't what you want to hear, but the issues sound quite usual and fairly minor. There's often quite a few odds and ends to sort when you move.
A convenient location and a nice big kitchen sound fab. The rest you can just improve slowly. You don't need to love it right away. Nobody does really until they've got properly settled in and adjusted. Think of it as a slow burn - and you'll appreciate it more and more as you accomplish the little jobs that need doing.

It feels bad at the moment but get your head down and tick off these things one by one. As a single mum I had a similarly long todo list and no family help, I’ve had to redecorate on my own in between working full time and looking after two young kids half the week. My kids share a room with a boiler, not sure why that part is worrying you?

A nice convenient location sounds perfect as that's the one thing you can never change! Everything else can be improved in time. And the large, renovated kitchen is a big positive.

Can you widen your gate posts a bit to make it easier to get in and out?