The state of Ranked at low elo

So I stopped playing League of Legends for about 8 months due to getting fed up with leavers/greifers etc. I played 1 game today and I've already had a leaver. I don't understand how LoL plans to market their game to new players with this horrendous plague on their game. Several of my friends have quit and moved on to "bigger and better" games where these type of problems are less detrimental/non-existent. The tribunal was a start and I DO believe that it is dissuading others from participating in these types of "toxic" behaviors but in the end they don't get banned, their account stays open, and they just wait until they can strike again. I realize that "banning" people who've spent their hard earned money on the game is REALLY bad for PR and REALLY bad for trying to get new players, but what's the point when you can't keep them anyways because your player base is too volatile to enjoy the game? As someone who's been enjoying this game for years, I cant continue to support a game that refuses to deal with one of it's LARGEST problems in any sort of permanent fashion. I just wish I could enjoy this game, but with the state of ranked, I find it impossible, and believe the only real way to be happy with it is to end my relationship with Riot and the game they've created.

Enjoy my money, A concerned fan.