Instant Permabanned

Literally had a game where my support was just running it down, in laning phase she went 0/6 in 12 mins. So I was pretty tilted and thus I flamed. I get if I had wished some form of injury or death on a player that I would get straight away banned. But I literally was just swearing at them. Where is the 2 week ban? I got instant banned for one log, are you serious? I might have past offences on that account but still, surely if you are bringing out the honor system and I hadn't been penalised since then, you should take that into account instead of just permabanning. Wtf