I don't think those Camille and Yasuo need a permaban. I would place Kat higher than those two. Regardless, in soloqueue, unless you're playing in challenger than the players are abusing their champions to near perfection, bans almost don't even matter because you can just play better than them and win. There's no auto-win champion right now.
Also, in blindpick, people will do all sorts of roles and lanes and general chaos. If you're still stuck with two mids, two tops, or any highly off meta games, chances are you're playing in really low elo. The higher you go, the meta tends to stick out more and you can get you solo mid or w/e you wanted.
And no you can't get stuck in low elo because of this. If you're a better player, you should be able to climb out of those chaotic games and get to a more meta playstyle games.