You can make a custom format, which filters the stuff you don’t want and add that to your quality format with a negative score. Radarr won’t pick them up then anymore. If you don’t know how to do that, I could explain it.
Will that install qBittorrent by itself and allow Sonarr and Radarr that run outside the container to speak to it? Then it would be perfect
Edit: For some reason I thought it was a torrent client but it’s just a VPN client. So it creates a network interface but doesn’t route all traffic through it?