Spotify's UI and their response to features is the worst thing ever. I really wish Play Music or whatever started integrating Youtube video music as well, and that it actually stopped skipping during play so I could make the switch.
Like I can't re-size columns anymore. Used to be able to do this. Now it's gone. It's super obnoxious for playlists that have classical music in them because oftentimes the piece gets cut off.
Then there are SO many bugs in the UI. I had a super annoying one a few weeks ago where I have shuffle on, and if I manually picked a song to play, that would turn shuffle off. So any time I wanted to hear a specific song in my 300+ song playlist, I had to turn shuffle on again.
Oh and ANOTHER super obnoxious bug/feature: after a while, downloaded playlists just aren't downloaded anymore. This is extra annoying for flights because I KNOW I have playlists set to download, I KNOW they finished downloading, I KNOW they were downloaded and playable for a few weeks, but still every damn time I get on the plane, after a few weeks of the playlist being downloaded, the files are gone. And I'm stuck on the plane in offline mode with no music to listen to. Play music doesn't have this issue. In fact, I don't have to tell it to download anything. Last weekend on my flight to LA, Play Music had cached/downloaded the two playlists I use the most.
Spotify is such garbage. I hate it so much.