The Mac UI is actually pretty crap
I use it almost every day, not by choice. And it seems designed to slow you down. And some of the design decisions are just ridiculous. Really, what justification can there be for forcing me to only resize a window from the bottom right other than trying to make things more inefficient. Why can't I close my macbook lid and have it keep running? I guess it's not meant for any work that takes more than a few seconds to run. Why does clicking the little red x sometimes close the application while other times it just minimizes it, there's a minimize button I could have used if that's what I wanted.
Every day a new annoyance, I can only surmise that people either don't use them for any real work, are too dumb or too brainwashed to see all the multitude of problems with the Mac UI.