Doesn't it annoy you that you have to constantly keep turning off that **** "Game Center" every time there's an update?
No. I turned it off the first time I saw it and have never seen it since.
It's annoying that Apple is starting to implement and lock down things that they "think" I want rather than letting me choose.
There are some UI features I absolutely do think should be optional - the Control Centre is one - and even if it must be there why does it have to have so many modules that I don't use. In 29 years of using Macs I have never mirrored my screen. But for some reason I must have that module. And the others I can mostly access more easily from my keyboards. So I basically ignore it.
BTW there are other email clients if the one you're using now doesn't suit...