I forget why exactly I did this, but years ago I deleted Spotify for something related to offline playlists. I kept my music offline, and I'm guessing they messed that up. Plus, they would randomly re/move songs or whole albums, which I know isn't entirely their fault, but the poor UX surrounding these occurrences was annoying enough to help drive me away.
I've tried going back a few times, but it just isn't worth the money.