Premades in one story.

I apologize in advance for spelling and grammatical errors, never my strength. I just played with trio que who reminded me what this community often does and reminded me how terrible it can be. From champ select this trio wasnt acting normal, they said they would trade, never did. They all picked out of position champions(ex. Morgana Jungle, Amumu mid, sejunai Support). I didnt think much of it until the flaming begun and i was being targeted for playing like a normal person. I was nasus against singed, i farmed stacked, hit him when i could but didnt go out of my way to chase him because im not falling into singed's trap. I had about 250 stacks at 14 mins because i was basically free farming against proxy singed, i was flamed for that, i was flamed for not chasing singed and told that i had no idea what i was doing and doing everything wrong. Then they told the enemy team to report me because i was unskilled and didnt cooperate and this and that, in the end they all fed, i got the only tower of the game and had the second most gold in the game. Things like this literally make me feel mentally instable i question whether or not im a fucking idiot and makes the experience of league very unenjoyable many times. I reported them all but i just feel like nothing is gonna be done and not enough has ever been done.. it would help if you let me know what you guys think

TLDR- Duo's and Trio's and 4o's(idk about that one) cause problems with random players and get support from their friends making the odd people out feel not so great