I do get lockscreen wallpapers, but in general I find them quite pretty and interesting. I've never tried changing to a fixed lockscreen wallpaper, though I I do have a fixed, custom desktop one. I can't think that people are obsessing about the lockscreen???

I don't see any of the other things you do. I use Edge as my default browser, with uBlock installed and it all seems to work. There is a Copilot icon, but I think I could remove it if it irritated me, which it doesn't. My Asus Zenbook has a Copilot key which irritates me much less than other aspects of the keyboard layout which have nothing to do with Microsoft.

All in all, I like Windows 11. I don't see how it has made things worse than any of the other NT versions.