Windows 11 has another layer of "visual style" on top of Windows 10 visual style, that is the main reason why it's slower. Instead of using a new DWM style from the ground up, they just added a new style on top of the previous one.
They keep insisting on adding more and more stuff on top of old stuff and removing basic functionality that was already there to begin with.
I've worked in technology my whole life, what MS is doing with Windows 11 is disgraceful. They should had stick with the Windows 10 model... I guess it was too much to ask.
I am currently running Windows 10 2021 LTSC and I cannot be more happy. It is snappier, uses less CPU, a lot less memory and games seems to be running more fluid. Windows 11 is a beta OS, heavier, slower and less useful than Windows 10. There is no other way to put this.
Also, it is the first time in my whole life that an OS forces me to purchase a third-party software to improve the start menu. I've always adapted to what MS threw at me and the new start is worse than even Windows ME.
Start11 already is 100 times better than the new Start Menu, there is just NO EXCUSE to launch a product like this.
We can't even move and stick a freaking shortcut from the desktop down to the taskbar!!!. This was possible since forever!!