I agree completely about each being good for its own thing. I quite like iOS as a phone OS. The limitations often bother me, but since it's tiny screen that needs to fit in my pocket, I'm creating my own limitations anyway so I'll use it less (1).

I switch around enough that I try not to do crazy amounts of personalisation in my desktop OS. Probably this evens out the OSs and there are aspects I like and dislike about each. I guess I prefer KDE Plasma to Windows or MacOS. I choose that for my own computer, but I spend far more time in Windows. I'm not sure I agree it it much worse from a UX perspective. It allows keyboard only usage very easily, which is something I struggled with in MacOS.

1) I'm only focusing on the UI - there are some things I struggle to forgive, like not being able to set add my own ringtone or alarm tone, or not being able to have the volume of a ringtone increase as the phone rings like on every ancient feature phone.

I've given this a little more thought, and I agree more with "Windows really does suck from a UX perspective" then I was thinking when I wrote my comment.

I really should have included the recent escalation in hostility towards users in my thoughts - built in ads, pushing unwanted products, trash news in new tab pages etc.