> And why i cant remove certain things from my taskbar?
You actually can, it's just they don't expose most of it to the user. However people have built tools [1] that give you a pretty UI to manage those more complex configs and apply them to windows. Bonus points in that you can use all the old windows UI elements from previous versions of windows and mix and match them as you choose.
Honestly I couldn't tolerate Windows 11 without something like ExplorerPatcher.