It's downhill all the way ...
Even the basics are being lost.
For around 10 years, dragging a photo onto the mail icon used to open up a new message with the photo in it - now we have mice with multi buttons I am forced to go via a crappy pop-up menu hierarchy to the 'share' options or play with cut and paste if my app is not in the list - assuming it feels like it.
And don't get me started on what a pile of crap Preview has become - trying to save a file under a different name now involves duplicating and renaming or exporting or some other nonsense - what was wrong with 'Save' and 'Save as' - which BTW appear in all other applications.
Moaning about iTunes doesn't count as it's been crap for so long and every new release means you can't do what you did in the last one - assuming that you can find anything again.
The simple intuitive gestures are disappearing on the desktop and being replaced by menus and stuff you have to read - and are often inaccessible via keyboard shortcuts.
Seems like they've moved on to another of Orwell's classics ..
The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which.