When cancelling my YouTube Premium subscription one of the exit survey questions for "reason for cancellation" was "Unhappy with the YouTube Music App." So clearly there's some awareness of the unpopularity of YTM out there. However while it specifically asked about the app, whereas the real problem is the whole YTM service/experience on all platforms -- in particular the web app. Hopefully the cancellations and the survey results percolate to the right people.