Its hard when you have "that bad game" and your team is constantly reminding you of it. You can shrug it off but it just gets really annoying when your team decides to selectively observe only the things you do wrong, yell out GG, and then turn a blind eye to you contributing immensly in the teamfights.
Had a game like that today where everything seemed to go wrong for me. Got counterpicked in mid, the enemy bruisers got so beefy that my spells couldn't do enough damage to them, and my skillshot snare was too easily dodgeable by the squishy katarina and ezreal..... Game essentially fell apart, and the nail in the coffin was me getting caught by the massive CC their team had when I was trying to waveclear off of our turret. Couldnt deny that i significantly contributed to our loss...... after the people saw i wasnt really counter-raging they at least admitted they wouldn't report or anything. =/