What kind of system or campaign setting that's less likely to attract freaks? I'd like to know what you meant by this lol
Tends to be a bit iffy, but I found that the d% games like Call of Cthulhu do a good job weeding out people who don't have the patience to learn to play. It's also decently popularish and for all the newer editions try to appeal to the clowns, its mechanics and cheap and quick death systems tend to work out. It also isn't that hard to learn IMO. Warhams Fantasy and the 40k ones also do a decentish job, since for all they reee about the IP they don't play often.
DnD is the quickest way to get a group, but also where you get the most "well fuck this guy" stories, since it's the go-to for it. ADnD or B/X are hit and miss too since there are a lot of equally retarded and awful players who are totally "based", since yeah it turns out cringe is apolitical. HOWEVER, it also is the edition that is the most likely to succeed since it ain't 5e. Do not Pathfinder, since there is a bit of a reputation of people who tend to drop if their optimized build isn't to their liking and it has the same issues.
For the love of god do not try recruiting with the World of Darkness. Yes you can easily get games with it, but you need to filter that shit hard since there's a lot of sex pests, gooners, weirdoes, and worse in that gang. A good group is doable, but it's a lot of work to set up.
Shadowrun and Cyberpunk 2020? Iffy, since I always found it really fucking hard to get a group to play anything longer than a short campaign out of it. And I had to DM that shit to get it to work. If you want to try it, I'd recommend 4e first since it's the quickest to learn, 3e second since it's the most refined of classic, and 5e last since for all it's clunky as shit I liked the game once I learned to navigate that mess of a book. Cyberpunk 2020 does have a troon and gooner problem, as sci-fi do to a degree since cybernetics, but it's less prone to that shit than others since Pondsmith is too based for them as a black man.
Since it's not a big hobby, I'd strongly suggest if this is a meat space thing to use a d6 system. Shadowrun and West End Game systems both did, and it's easier to get them in countries where the scene is weak. The latter has a good Star Wars game to boot.