Torrents can also max out your speed if there are enough seeds, unless you live in a country where your ISPs are allowed to throttle specific types of traffic or something. Or I suppose if you have 10 gbit downlink then you prolly won’t max it off a torrent.
Idk what you mean by fully automated. If you mean sonarr, radarr and the like, they work for torrents too.
I might very well try usenet when I get fiber in my current location (haven’t had it in over a year, it sucks, don’t recommend) and a server for the arr suite, but in general I like my piracy being free lol