I was punished for people trolling me

Not exactly punished but I did get a 30 minute wait timer but more importantly minus 13 LP on my account.

Really simple story: Had a really bad game after ranking up after the 3 man premade and my other solo teammate decided to invade, they got jumped and it resulted in our team giving up 4 kills, firstblood when to my enemy laner (ahri in the mid lane) then every went down hill from there due to poor decisions on my junglers part. Besides my opinion that we should surrender and that the game was over I wasn't toxic and never really said anything to my teammates, however before the game ended I told them "I really despise you guys" and said nothing more. While it doesn't matter, I do think one of them replied just before the post game lobby with "Kill ur self" or "Go fuck ur self". Something like that.

I decided to let the game go and move on but when I got into a new game it so happened that they were on my team again though this time they didn't like me. They immediately banned my pick that I had selected then based on how things were looking in the champion selected I assumed they were going to troll me ingame so I dodged. Now I have a shiny minus 13 LP that i have to win back because they guys basically forced me to dodge or potentially suffer from their trolling.

You might try to say that I was at fault but what I said didn't warrant trolling nor could be considered that toxic at all. I also would like to think I was entitled to be abit pissed as they caused what was basically one of my worst ranked games I've had because the premade decided to go full monkey mode and kept on digging our grave deeper and deeper till no amount of skill, effort, determination, or luck could've turned that game around.