You mean that calc.exe opening in 3 seconds is better than instantly. Or dissapearing ribbon and title bar on windows in a multimonitor setup is better than before. Or the new designed shutdown menu.Or the white fonts on light background. Or dissapearing scrollbars because someone thought that this is a good idea. Or the new save dialog when you need 3 clicks just to be able to select the folder where you want to save.
User experience. Windows 10 was an upgrade over 8, which was a huge downgrade over 7. Not only did telemetry not help Microsoft improve the UX of their OS after Windows 7, in Windows 10 it's been getting worse with each update, and Windows 11 is slated to be a disaster.