How is it fair to get suspended for flaming a troll?

So yeah, i recently got suspended for 25 games for flaming trolls. I'm not talking about players who simply have a bad game. Because of this idiotic "autofill", as an ADC main i have to deal with tons of people who won't simply quit the game when they get a support, but rather pick zed/yasuo/Darius etc. Now, by any means i am not negative towards those supports. I never flame them for choosing those champions, because I myself have some unorthodox picks. The problem starts when they start taking my CS, which is very common with those "autofill" supports. Don't i have a right to be pissed off about it, when a guy clearly does everything for us to lose a game? isn't that trolling? In my second game, a guy got pissed off about me not engaging in a 2v2 fight ( i did not do it because the enemies already reached lvl 2, while we were both still lvl 1), so he decided he will start trolling (letting me die on purpose, using skills in random directions). My suggestion is for riot to either remove this idiotic autofill from LoL, or leave alone the people who get annoyed with trolls.