I’ve tried cancelling my subscription, thinking it would make me watch less YouTube. I didn’t last 48 hours. The ads were too annoying and I signed back up.
I find it hard to justify paying for 2 music streaming services, so I cancelled Apple Music, because I'm paying for YouTube Music through Premium. However, I don't like it, so I'm back to manually managing a local music library in Apple's Music app. This is probably a better long-term approach than renting access to a music library on a monthly basis.