I used Google Music until they discontinued it in favor of Youtube Music, and I ditched that crap immediately, the UI was horrible, the recommendations were BAD (Google Music was somewhat good), and I lost about half my playlist items as "not available". It is so bad, that after years of Google Music, I just ditched my playlists (what little there was) and moved to Spotify.
I find the YT Music recs actually pretty good, though the "recommending a song after I thumbed down" behavior blows my mind in its idiocy. Also, the fact that they don't distinguish between me liking a video on Youtube and liking a song in YT Music is also frustrating.
The UI is the worst I've seen on any music service or player, but I'd found quite a bit of music I like through their recommendations.
I reported the bug about recommending songs that I had downvoted. Apparently I had more thank 5k downvotes so it didn't consider them all in the filter. The "fix" was bumping the limit.
I used to pay for Google Music and transitioned to YouTube Music but eventually gave up because it has so many issues. I also tried Spotify but didn't like it much so now I don't know what I will use.
I just tried listening to some uploaded music last night. Except the Artists page seems to be in random order vs alphabetical and there is no apparent sort option. I'm not sure how that decision played out.
