False Reports

I am curious as to how effective the reporting system is, specifically, false reports. I was in a game where my team did very bad, I asked to surrender and I was hit with "never surrender" I tried many many many times throughout the game because we were being completely out played and my team refused to admit it. I did get a bit salty with my team because I was doing very well and felt we could win but their refusal to preform basic mechanics like warding and team fighting lead to an inevitable loss. Three of our team mats were 1/11 and only the ADC and myself the support were positive I had 20 assists and the jungle had eight kills with the adc having twelve but thirteen deaths. I was rightly reported after the game for saying "you guys suck" which was my fault.

BUT after that game I entered a game and immediately muted the entire ally team, said nothing all game except to a jungle who taxed my lane after not ganking once despite me having a lot of trouble as leblanc top a role I was forced into btw So after the game the enemy team was blaming me saying I was negative, I was making my team lose, the entirety of both sides were blaming me when I said nothing and just tried to play the role I was given. So naturally I was reported and got a warning for negative behavior. I just have to ask..why does this type of peer bullying work?