I remember reading a post about someone setting up Jellyfin and some other software and essentially just waiting around a few days after shows come out and they end up being available in their media library. Like, some kind of pirating software that just grabs the right media. Is this a thing or am I misremembering?
As Ksynwa mentioned, Jackett is the one you are looking for, also it works really great with Sonarr and Radarr, they organize the files in a way so that the name are not gibberish.