I know how you feel m8. Sometimes this game is literally looking for ways to punish you. It is awkward when you get banned for replying to people who are literally saying crap like u probably got elo boosted, or wow you are feeding, even tho u might have died only 1 time. It is actually quite funny sometimes for me, but if you aren't having one of those better days then u can snap and pay the price. I can actually recall one game where my whole team reported me for not saying a single word during the game and afterwards while going for a new game i got that message saying that you should improve your behavior.
My point is this, mute every single player when the game starts and none of this will ever happen. There really is no point to chat in game which is quite self explanatory... pings are enough to get information.