Why is riot going blind to this?

With time more and more people stoping to playing LoL I can understand why. Now the prime reason why people leave LoL are not the OP champions but the community. I just don't undersand why is there not some kind of a filter on the chat and no I am not talking about censore filter I am talking about the ban filter, there should be a filter witch auto bans a player, see that system whould be awesome beacose you are not just going by reports. Why isn't there a filter on champion picking for examle if someone picks twitch jungle and he is the reason you lose he should be punished not whole team. {{summoner:13}}
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