What's the issue withe Windows 11 and gamers? As far as I know, Windows 11 is mostly a facelift on Windows 10.
Regarding the UI changes, Microsoft finally fixed the practically unusable Window 8/10 Start Menu and its distracting "Live Tiles." Microsoft has also moved away from the stark, angular "flat" look of Windows 8/10 and added a bit of dimensionality to the UI. That's about it for the changes.