chat ban

so i just played a game of ranked where my adc (miss fortune) started to flame this guy jarvan who was streaming on twitch and put a link in chat, mf started saying things like ''that one viewer whos watching u is probably retarded'' ur also stupid and stuff like that for no reason, i started to defend him, 30 minutes later of this guy flaming me and jarvan , I started to kinda shit talk about his score because i've had enough and i wanted to defend jarvan as he was very friendly. after the game i've been notified this miss fortune got a penalty, one game reconnect later, i've got one too. I legit share a ban with a guy that said this jarvan's viewer probably has mental issues because he is watching him, and i said stop talking ur dumb 0/9. whats the deal with that?