Some time ago I gave up using sonarr & radarr to watch (popular) tv shows and movies because the search just stopped giving decent results. Now I heard that rarbg has also quit.
But the truth is the problem isn't Sonarr or Radarr it's just that Torrents can be kind of garbage with automation, I would suggest you look into Usenet. It costs a bit of money to spend but a much more consistent experience.