14-Day Suspension for being bullied? Okay...?

So I played a game yesterday and played blind pick with 4 randoms, let everyone choose their roll and filled in adc with some support I never met. The support literally leaves lane and doesn't help me at all and I'm attempting to hold a tower against the enemies diving adc/support by myself. Over the course of 20 minutes I'm ending up going negative and 2-3 players on my team start bashing me, and I rebuttal them by saying well maybe if I had a support I wouldn't be getting pressed and double ultied to death every time I go into lane. The players on my team over the course of a 45 minute+ game do not stop bashing me. Not because of my behavior, but because I went negative in the 1v2 lane. They start name calling me, cursing at me, and be plain disrespectful and get the enemy team involved. I'll admit in the course of the whole game (I read the chat logs) I cursed twice, and they were in general, not directed towards anyone, after the other players have been laying it into me the whole game.

Without dragging this out too long, what is the basis on giving people suspensions/bans? Just because a bunch of kids raging that we were going to lose, literally cursing and name calling me, (which we didn't lose, I actually pressed their base and triple killed the enemy team by myself in the end for nexus) and I proved them wrong, they reported me. The entire conversation and the Riot staff could've read it from the game chat logs could tell, everything I said was in rebuttal to the nasty things they were saying to me first. Why am I the one getting the ban, sincerely confused and actually quite curious to hear a non-robotic explanation. Just because 2 guys on my team reported me for trolling cause I went negative, after being the world's biggest shmucks to me. And the enemy team doing the same, and then reporting me because I beat them in a couple of 1v1's before we finished the game. What's the basis?

Thanks for whomever time this may have concerned.