I would suggest, for starters, at the beginning of the game /mute all. Then I would suggest practicing self-control when it comes to impulsive, negative chatting coming from yourself. Remember that it's just a game and this is all for fun. Yeah, play competitively if that's your thing, but at the end of the day, you're not winning or losing anything IRL. You don't get a prize delivered to your home for winning. You don't lose money if you lose a game. This is simply for entertainment purposes. (None of this includes pro players, obviously). So keep it fun, keep it nice, be respectful of other people and their feelings. I'm sure you don't like it when people flame at you so don't flame at other people. The road to a less toxic community starts with you. I know that is very clichΓ© and corny, but it's still true. If every single person took into consideration their own actions and behavior, then we could rid toxicity for good. But you have to work on yourself first.