There’s an option in sonarr to only create folders for shows when needed. That would at least help with the unaired shows. Also, I’m pretty sure when you choose to delete them from sonarr it deletes the folder too. And there’s also the option in jellyfin to allow users to delete shows, you have to activate it per user.
I can stream to my phone without premium with plex, only the downloads are linked to premium afaik
The biggest issue I have with Jellyfin is you can’t hide empty shows, and I have folders for shows that have not aired yet or watched in the past
There’s an option in sonarr to only create folders for shows when needed. That would at least help with the unaired shows. Also, I’m pretty sure when you choose to delete them from sonarr it deletes the folder too. And there’s also the option in jellyfin to allow users to delete shows, you have to activate it per user.