Looking at your trials games, I didn't go through them all as effort, there's a few that ended with zeros across the board, and a few with the same players on either your team or enemy, so I'd guess either DDosing the other team, or lobby boosting for wins, either gets you banned.
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I don’t do either of this. Right now matchmaking is bad and you play the same Teams often. Furthermore, if you back out of the game before it ends, it doesn’t count as a loss that explains the zeros. So I still have no clue. And I am a pretty decent play so I don’t need to dos or lobby glitch.