I use Youtube also, I subscribe to Premium so that includes music and is ad-free. Never not found a song or artist I was looking for.

I listen to music mainly in the car or maybe as background when I'm cooking or doing other chores. I am not someone who has earbuds in all day or who does focused listening or spends time making playlists or seeking out new artists in my favorite genres. So the playlist management, discovery, etc. features and whether they work well are not really relevant to me. I care that its main functions are easy to use and work, and YouTube music does that.