Windows 11 just lost 5% market share in two months despite Windows 10 losing support.
(www.windowscentral.com)
It isn't even just the performance and bloat issues or the AI.
As you hinted, Windows 11 made a lot of changes to the UI. I can't think of a single change made which I liked as someone who has had to deal with Windows since before 95. Windows 11 felt like a downgrade from Windows 10.
You've got a lot of managers with purchasing authority who developed a ton of muscle memory on old Windows. The new UI changes have made Windows feel alien enough that you can't use retraining costs as an excuse to keep with Windows.

