Obsoleting a lot of relatively recent fast hardware means people are either faced with a fuck off or complicated work arounds. Then there is forcing people to log in with their MS email account which they may not have or want or again forcing people into complicated work arounds. The implicit privacy issues of recall if it was rolled out as planned.
Ads in the windows UI both exiting and planned.
The fact that they have discussed the idea of making Windows a monthly/annual fee.
Then the carry overs from 10
The fact that the start menu search is less useful than any linux DE or windows XP
Re-enabling crap that people disabled on purpose
Certain kinds of links opening in Edge even if people use chrome