I've been around long enough to remember MS and their fans banging on about how bad other OSs were for their inconsistent interfaces, so I feel justified in getting a little riled at the hypocrisy of how much of a mess UIs are in Windows these days.
And I don't see it getting any better - they'd rather spend the time finding new places to slip in adverts. And this is far from the fault of app developers, while they often do have something to answer for wrt consistency, because the worst culprit is MS themselves both in their apps and the OS.
I shouldn't have to click to make sure the right thing has focus for instance, particularly after switching from another virtual desktop, I should be able to see this information easily but there is no consistency in titlebars and other window chrome any more.
Plus the whole thing is meant to work on ancient Windows versions (like, Vista and WS2008 ancient), so that ultimately defines the minimal common UI denominator.