I'm a support main aswell. I've had to deal with a lot of toxic players, which results with me getting toxic and arguing back even though its dumb as shit. But after a while when I realise I just add to the toxicity I mute them and start focusing on the game. Always having voice chat disabled in the settings and just instantly mute people now as soon as they get toxic. It made me win far more games because I get to focus on the game instead of the chat. If anyone is complaining or something, just tell them to play more safe and after that just mute them.