Most of the pushback seems to come from a loss of trust. People feel Windows is becoming more of a service built around telemetry and ads rather than an OS they control. Until Microsoft addresses that underlying concern, frustration will keep showing up.

[dupe] Discussion: https://news.ycombinator.com/item?id=46001727

It's a giant pile of stuff that isn't at all cohesive and they keep building on it, and building on that, and building on that again. Everything uses entirely different technologies. You go through the menus and it's like doing an archeological dig. It's slow, things take forever to load, constant driver issues and freezes. I had my mouse start chugging for no reason at 20% CPU load with one update and it stopped after another update. The updates get randomly applied, so make sure to save your work, don't count on putting it on sleep overnight and coming back with your work tomorrow. Speaking of, when it updates it can't do it in the background, so since it's in my bedroom I put it on sleep and then get woken up at 3am with a bright blue screen staring at me!