I'm not so sure that Windows is unfixable. It could probably be fixed, but doing that would require rebuilding every burned bridge back to its old standard, and probably then some, and that's something the relevant people aren't going to agree to do (since they were the ones who burned them).
Mandatory updates? Now they aren't any more.
Onedrive stole your files and deleted them? Now Onedrive is enabled/disabled on first setup.
Shitty start menu? Now you can pick which one you want, all the way back to the Windows 7 one.
Shitty right click menu? Now the old one is back.
All AI? Now there's a toggle on install to enable/disable it all.
Now settings menu sucks? Here's the old control panel back as standard.
Telemetry? How about no?
If MS did all of these things (and probably more), their trust level would rise skyhigh, since they'd be doing tangible things to fix the pain points we've all talked about. Now they've hit one point out of probably 50+, and many of the remaining ones are much harder to fix than updates being forced.