I was a pocketcast user for years, switched to antennapod a few months ago. Here's what's bothering me:

• Antennapod has a weird separation between new episodes (inbox) and what you're listening to now (queue). PC has that abstracted away where you only have to check one place for your podcasts.
• There is no simple service to sync your subscriptions and listen progress. Gpoddersync is basically abandoned and the protocol lacks features. Hopefully this will change with openpodcastAPI, but they haven't managed to secure funding yet.
• I've been spoilt by having a server doing the heavy lifting of refreshing my podcasts. It's a minor annoyance that I need to wait approx. 1.5 second per feed to refresh. It's just the way it is.

There are also things that antennapod does better:

• chapters actually works in AP.
• episode pictures also works in AP, PC only showed the static image of the feed.
• search is just as good as PC.
• its FOSS and hopefully resistant to enshittification (unless all producers go into a closed ecosystem like Spotify tried with their recent purchases of pod-studios).

Best of luck from another pod-nerd.