No ads on my windows 10. Yes you have to configure it a bit after install, but once you do it can be pretty lean. I ran it on a machine with no more than 4gb for a few years and it was fine, clean and fast.

I was talking about Windows 11. That is much worse.

Yeah of course there are ways to get rid of all that. Plenty of decrapifier scripts on Github. I use https://atlasos.net