Agree.
I really love Apple, but I always find myself Googling for "Can I do that in iTunes?" (the answer is usually No) or "How to do this?".
And I can't say that I want something weird.
Some workflows look so simple and obvious to me (and I think most people have the same workflows), but they are literally impossible with iTunes and other Apple stuff.
For example, I have a 2TB AirPort Time Capsule, but it looks impossible to backup my iPod or MacBook directly to it (which is nonsense, why do I need 2TB then?).
So I have to create backups with iTunes, then go to `~/Library/Application Support/MobileSync/Backup/` and copy everything manually to the capsule.
Searching for a song in iTunes is always confusing. Why don't they have global search field that searches in both Library and connected device?
Photos app is another nightmare (and photos management overall)! Again, I just want to connect my iPhone or my camera and transfer photos to AirPort Time Capsule. Impossible.
Or in macOS, you can't just make some apps fullscreen: they always have that 5px gap between app window and dock bar (http://apple.stackexchange.com/questions/141800/gap-at-the-b...).
Or the fact they don't have proper window management and themes. One have to use third-party apps full of hacks to have, say, dark window theme or some parody of tiling WM.