Check the memory usage of your rbpi because it should be barely scraping by if you have the max 8gigs. Too many jellyfin sessions open and you might be running into real problems.
Jacket and Prowlarr are redundant. I’d stick with Prowlarr. Also i never heard of Real Debrid before but it sounds redundant to the entire setup.
Go through your sonarr/radarr settings and configure quality profiles. trash-guides.info