Essential Windows 7 support (like security updates) continues into 2020, and some new PCs are still being sold with it, or can easily go back to it from Windows 8. There's a rift between 7 and 8 that was never fully solved (by MS) for the mouse+KB crowd, and 10 brings its own set of unacceptable issues to some (like inability to prevent updates--aka self modification to suit Microsoft, not necessarily the user--and the focus on proprietary apps). Win 7 remains the newest version which adheres fully to the original principles of openness and user control tailored for full PCs.
I'm with you in general. But again, Microsoft-published games are a different animal altogether. The way it looks to me is that they're extending the Xbox into the Windows-10 space. Stuff that was originally slated only for Xbox crosses over with the same walled-garden rules, and is generally interchangeable with its counterpart on the console. That doesn't bother me. If they start trying to muscle out Steam, Origin, etc, and self-published titles that come outside of the app space, then it would piss me off. (Technically, they can do it too, with unstoppable updates.)