PSA: If your summoner or club name is "toxic" you have no right to complain that i mute you.
What else would you expect, if you even put it in your summoner name? Bonus points if your name is "unreformed" or any similar antonym. You literally put it in the name to warn the world of your nature - of course i'm going to mute you as soon as the match starts, to protect both myself and you from your own behaviour and its consequences.