have you tried their "books"? you cannot search by almost anything! Extra-strangely, selecting book language is macos-only feature!
Does anyone even maintain it?
My main issue with podcast alternatives is that onbe feature I use is walk into a room and ask Siri to play a podcast. That works with Apple but not anything else. What is the latest podcast has to sync across devices.
However any maintainance or search for podcasts is crap with Apple and better elsewhere.