Do something with trolls v2

Why does RIOT do nothing with the trolls I meet in this game all the time? I just lost the game where that idiot took Aatrox on the bot and was intentionally killed ??? He play 8 games today and he always int, make 0/10 stats 0% k/p and low farm. Believe me, I meet such people EVERY GAME. Not only in my team. Riot just looks at that you write something bad in the chat and not for obvious trolls.
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