How do you fight with toxicity?

So this game protects toxicity and toxic players extremely heavy. Typically, you have from 2 to 4 dogsh*t persons in every game, so-called players, on your so-called team, who are insanely toxic. 1. If you answer to their toxicity, you eventually will get banned for chatting (since they are in almost every game). 2. If you punish them with afk, you get banned for afk (since they are in almost every game). 3. You for sure want to kill them, but you can't , cause they are on your so-called "team". So the question is: how do you fight with toxicity and the system which protects it so hard?
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