Yes, UAC could be considered as annoyance by some but it's no different than "sudo" on single-user Linux machines and we seemingly have no problems with that (I wish we'd move on past that because it is damn annoying and offers no security benefit).
Comparing Vista to modern macOS is insulting. Vista didn't have that level of jank and the UIs were actually quite good, consistent and with reasonable information density, unlike "System Settings" or shitty Catalyst apps.