Getting banned cause of a bad game?

So does now riot ban you for a bad game? I mean I had a salty bot that was constantly abusing me because i was dying due to ganks and never been ganked by my own jungler, I went bot to help them and missed my Shockwave as Orianna so she flamed me even harder, but because I had a bad game I was reported by my team as a UNSPORTSMAN PLAYER and now I'm banned, seems pretty fair.
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