What I find difficult isn't really the children themselves. I love my kids, and I enjoy spending time with them. It's the constant, debilitating exhaustion of all the admin and logistics.
I'm working full time, managing a variety of childcare solutions (I work early mornings, which is really tricky to cover), then cooking (a UPF, salt, sugar free meal that children will actually eat, on a budget I can afford) clearing up, reading, sorting packed lunches after school, then washing hair and getting uniform sorted, and trying to get the younger kids in bed by 7.30 so I can help the older ones with homework (and then recording all this bloody reading, spellings, homework etc on the bloody apps) There's not one minute of my day unaccounted for, and I can't ever afford to get 10 minutes "behind".
I used to work part time which was great. But then I took a promotion (to a role I love) which has to be full time.
Life isn't currently set up for most people to be able to enjoy parenting much of the time.