It's funny Youtube Music was mentioned because Google Play Music was actually great for listening to your music and having a curated library of stuff you uploaded along with the music on the service. When they killed that in favor of Youtube Music I noticed the "library" experience there is seemingly intentionally hobbled. The artist page is sorted by the "artist" field not "album artist" and then on top of that instead of using a nicer page[0] they use a playlist view of all their songs. Additionally the library view is intentionally split with a "uploads" and "library" tab unlike in Google Play Music where it would provide a nice shared experience with the nicer artist pages as well.
YouTube music is awful. I hate how everything is organized. Is it even possible to search your library? I haven't figured out the actual point of adding anything to your library because searching takes you to all available options every time. And it is never sorted the way you want. For example, if you search an artist, you get their top three albums, but then you have to click into it and search for the one album you want to listen to. I'd rather the top three albums be the ones I have in my library, not their most popular current albums. I don't listen to as wide of variety of music as I did in college and I think a lot of that is yt music makes search so difficult that I can't get to any stuff in have not listened to recently.
I remember thinking how disappointed I was when I moved from Microsoft's Zune to play music. Now I'd be happy just to get play music back
I used GPM for that exact reason. When Google announced they were killing it for YTM, I setup an Emby server and never looked back. YTM is an abismal service.
Supposedly Jellyfin is pretty good now, but that wasn't an option at the time and I've been comfortable with Emby.
[0] https://music.youtube.com/channel/UCdrA9E1ir8pDttg7vTqrSxQ
[1] https://i.imgur.com/DTken2N.png