In the last year there was a rather large UI overhaul on the desktop client [0] that was met with mixed reactions from its users (doing a search in their community forum can locate some such threads). I for one was left with a bad taste in my mouth when it launched due to some pretty major changes of how libraries and albums were handled. Though some things have been fixed, I'm still sour on a lot of the changes.
[0] https://newsroom.spotify.com/2021-03-25/introducing-a-new-sp...