Podcast Addict is THE feature rich podcast client. A boatload of features and if it doesn't do what you need you request it in the support site.
It has its issues: closed source (if that matters to you), I've read that there are trackers, and ads, but it's still the best podcast app out there, hands down.
I switch from Google to PA with the first email like this that I got from Google.
I tried maybe 4 alternatives and ended up sticking with PA. I don't really like it...it's most used icons are small and hard to reach, navigation is very unintuitive to me...but basically it sucked less than the other options.