It's ok, and getting better. My big problem with it is (like you) that Google Play Music was incredible, so good, and they discontinued it in favor of the much worse and awkwardly named YouTube Music.

Whoever convinced them to give up the branding of "Play Store, Play Music, Play Movies" should be drawn and quartered.

I liked it but the fact that they stole our google play music purchases to replace it with a sub only service soured the experience quite a bit.

I never really used it for YT Music. I don't like YT Music.

I liked no ads + background playback on iOS and Android without having to go through hoops like using NewPipe/Revanced.