I use YTM exclusively for music streaming. The interface has been getting worse over time, but the podcasts integration is pure dogshit and they should be embarrassed. Basically it's a subscription to a youtube channel in the back-end and they might add RSS support some day in the far future. Their only focus now is on allowing creators to add an RSS feed for ingestion, not for users to do the same.
This is a moronic idea, and Google is ruining one of their only good app experiences.
Navigating any playlists you created now requires clicking on the library at the bottom, then playlist at them top. I'm also a GPM refugee and the YouTube music app is a shit choice for podcasts.