Banned for Having fun...?

I was speaking with my friends in the beginning of the game, and we are in a discord call. We were just having fun, and played Riven, Yasuo bot because I didn't want to support and to make it interesting we chose that. The jungler, adc, and support (Me) were all in the call. We starting talking smack about each other in the chat just to joke around with everyone else. I guess everyone in that game was already tilted or something. The enemy was talking trash, and thought that our Jungler was mad, but he wasn't he was messing around. I did call my jungle a %%% and told him to kill himself, but that was, again, jokingly. We were on discord... I don't understand why anyone else would care. Anyways, I don't know... I feel like it was an injustice ban. I think it's the first time I've been suspended since like season 3, and those days were just because I left the games, since I didn't know you could get banned for that. Here is my chat:

Game 1 TheGanster358: first game in like 4 days TheGanster358: please care TheGanster358: its been too long TheGanster358: and kys %%% TheGanster358: mid and top TheGanster358: you guys might have to carry TheGanster358: for a bit TheGanster358: lol TheGanster358: reported TheGanster358: I'm homosexual and that hurts my feelings TheGanster358: na bro TheGanster358: easiest game ever TheGanster358: when i get there TheGanster358: go on raka TheGanster358: btw we just having fun if you havent npoticed x3 TheGanster358: he is... TheGanster358: us 3 in call TheGanster358: lmfao TheGanster358: im more surprised you still think he's mad TheGanster358: because im having fun TheGanster358: if you hear us in the call TheGanster358: its funny