windows 11 works without problems I have hundreds of programs
And how many actual Shell Enhancements do you have working without problems?
You obviously don't understand the mechanics of an OS.
Microsoft does not design its ui so that it can be changed
And that is exactly the point. They are still changing it themselves so there's not a lot for third parties to work with still, not when the goalposts keep moving.
ALL previous OS releases [prior to 10] were sufficiently finished and straight forward to design for, and they too were not "design its ui so that it can be changed'.
Stardock can and has for every Windows release, and will again for 11 - once MS has finished screwing with it.