Ombi always gave me issues and I switched to Overseerr. Similar but more in the *arr family. Since you use Jellyfin, can use Jellyseerr instead for a better integration.
Then use Prowlarr to sync Torrent/Usenet sites to all the *arr services.
The three of them are all pretty similar, achieving the same goal; whatever works for you.
I’ve never had an issue with Ombi, so I’ve stuck with it. I actually use Emby instead of Jellyfin, so Overseerr isn’t an option, and I’ve just not had a reason to try out Jellyseer over what’s already setup and working.
Prowlarr is definitely a good recommendation. I used Jackett for the longest time; but being able to modify indexers in one place, then have it propagate to the rest of the stack is so much nicer. It lists a ton of indexers to look into too, if you need more.
