What have I done wrong? Landlords and renters!

[Kapalika]

I bought a flat in 1999. Yes I'm old! I lived there for 6 years, then met my now husband and we moved to a house.
We budgeted and were able to keep the flat.
We've had 4 tenants in that time, the last guy was there for 12 years. He moved out in 2021 and we now have new tenants.
2 sisters even though it's a 1 bed flat. Ok, they said they wanted to share the bedroom. Fine.
However, the ‘lead tenant’ then started complaining about various things.

1. Needed new black out curtains in the front room. Fine. I did that.
2. Have moths that will ruin their clothes. Massive apologies from me. Paid for fumigation. The guy who did it said there was no problem, but ok.
3. She requested a rug for a carpeted floor. (ok, no problem. Bought it)
4. She tells me her sister has OCD, so we can't access the flat. Ok fine.

She has said she wouldn't pass the affordably check as her sister has now moved out.
I mean, honestly?

But really? She doesn't reply to text messages or emails. I've called her 3 times over the past year. No response. She's a teacher and said she's very busy, but now is the time to renew her contract and she just doesn't respond.
I've said it's a £10 per month increase.

I don't think I'm being a complete bitch. Or am I? Seriously, what am I doing wrong?
There are other things, but minor and not worth mentioning.

I would serve notice

You can't just 'write a clause' into a tenancy saying the tenant must allow access! It does not trump the law! Tenants are only required to allow access in an emergency or for annual gas/electricity safety checks.

I would NOT extend her tenancy and give her legal notice in the correct way according to your tenancy agreement and location. In some areas there's an increase in demand for rental properties and you can find a much better tenant than this.

Jesus. Can I move in?! Two windows in my flat currently broken. One is stuck open. The other I can't open incase it won't close again. I can't use the oven because it's a fire risk, as are 12 other electrical faults that the landlord refuses to fix. It had fleas when I moved in which I treated myself. I can't imagine asking the landlord to buy me a rug 🤣

I know that, I have rented for many years. It doesn't trump the law but sets out quite a reasonable expectation between the landlord and renter. I would want to know that my landlord cares about the upkeep and condition of the property and yearly visits, even if by the letting agency, are often good opportunities just to keep in touch with the person who owns your home. I didn't see my landlord for years in one property (just called him when there was a problem) and one landlord lived down the road and was round all the time. There can be a useful middle ground.

Sounds like she's going to stop paying her rent soon. And there'll be fuck all you can do about it. Councils even fund tenants' court cases to stop them being evicted.

This is is why so many landlords are pulling their properties from rent.

All that change to legislation really hasn't helped all those homeless renters now, has it, but I'm sure the champagne socialist campaigners arentvadfect in their nice cozy paid for homes.