I’m surprised so many people wouldn’t want a DP like mine. I’m mostly proud of him and happy for him and think he is wonderful.
You are deliberately missing the point.
Pre children, I would love a DP like yours. DP working until 10pm suits me perfectly - I'm a freak who likes cleaning, so time to get the house all sorted, nice bath, bit of Love Island, catch up on work emails, then he comes home and we engage in intellectual conversation with loads of laughs over dinner, cup of tea while he showers, TV together then wild sex at midnight.
Sounds like a dream, honestly.
But I cannot stress enough how much this will completely change. Especially if you decide to give up work. (Please don't give up work though). Either way your life is going to be turned upside down, the things that used to matter stop mattering and things you never even considered before will become The Most Important Thing.
Have you ever hated someone so much you could scream because you're so sleep deprived, you need to sleep, and they are snoring soundly beside you without a care in the world? You are tired, exhausted, brain fogged, stressed, the most basic shit like leaving the house becomes a monumental hassle... and he will never understand. Ever. Can you imagine how frustrating this is?
Add in colic or a baby who doesn't sleep. Or post natal depression. Or like me, a post birth DVT + PE that leaves you unable to walk for months. And that's just the first year, without going into the drudgery of every single bedtime routine and every single 5am wakeup and every single bit of homework, dance class, PE kit, playdate, birthday party etc.
And what if he never even pretends to understand and actually argues with you / puts you down? Complains the house is a mess? Complains the baby is waking him up? He can't possibly hold the baby so you can shower at 10.30pm because he needs to shower?
Just imagine all the pent up resentment in these situations and then imagine him turning around and saying well you knew it would be like this. I never said I'd be doing any of this. You've known all along my work comes first. Why are you complaining when you wanted this? Yes, I know we didn't plan to have an autistic child, but we didn't plan to have any child.
That's the point you come on Mumsnet and 100s of posters who have been there, done that, tell you to LTB.
I left my own bastard because he had depression and wouldn't get out of bed (so hardly his fault but there was just far too much resentment - I was doing everything on my own, inc working full time, and he just didn't / wouldn't / couldn't understand). I loved him too, a lot, but ultimately I loved myself and my child more. I lasted three months. At least on my own there was nobody around to minimise or fob me off. I was doing exactly the same amount of work but the resentment being gone made it instantly easier - as did the Friday nights and Saturday mornings to myself - which I eventually ended up spending with someone exactly like your DP (no child? No problem.)