I would be thrilled to hear that Apple is totally revamping iTunes; I swear at it at least a couple times a week. But I'm probably not going to be able to stop using it any time soon.
I'm not sure I really understand the people who use alternate music player software on OS X; huge collections of downloaded music files accessed through file player software doesn't seem like where digital music is headed. I had a gigantic collection of purchased music on my computer, and it's more an annoyance now than anything else.
Hating iTunes so much you can't use it makes sense to me. But then, why not just use Spotify?
Anyways: predicting where this thread is inevitably heading, here's a list off the top of my head of shit that drives me nuts about iTunes:
* Purchased tracks randomly grey out and become non-playable.
* I'm a "Match" customer, and iTunes/iCloud/whatever doggedly insists on retaining the file-based metadata from my old MP3s, despite me not having had those MP3s in years.
* Ridiculous incoherent "Playlists / For You / New / Radio / Connect / iTunes Store" menu. "For You"?
* Playlists that contain both Apple Music tracks and purchased tracks flake out and vanish, which means that if you have a large collection of purchased music, playlists just don't work.
* Sometimes you can link to a playlist to share it and sometimes you can't.