How do you not rage in this game?

First game is someone AFK. Point out they're AFK. Get two members on my team be toxic to ME instead, swear-spamming and asking for x8 report at the end of match... I only pointed out an AFKer. No swearing, no baiting, no mocking, nothing... Second game. Two AFKers... Third game. Complete miss-match of matchmaking... Fourth game, two toxic players in a group... How the hell do people 'stay calm' in this game.
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