"Because Macs generally (for most values of generally) just work; a feat that Windows hasn't been capable of since Windows 2000.
What an absolute crock! I don't know anyone who would complain that Windows doesn't 'just work'.
It may not look or behave quite the way they are used to or like, but to say that it's not functional really goes too far.
That you prefer to replace a machine and hope for the best speaks more about your lack of knowledge and ability and points to abject laziness and apathy than it does about the operating system and the chances are, it's down to some third party weirdness anyway, not the OS.