It happens to me often. I play as assassin or ADC, quite fed so I can carry the game. But some idiot, who has like 1/10 says that we all feed and rather surrender. The surrender vote wins 3/2 and the game ends, while I lose, gets -25LP for a lost match and sometimes even lose promo or get demoted. I am very angry then because I experienced some wins, while we was 4v5, because of AFK, and still won. I am too angry for those people. Why not rather go AFK?
I lost more than 10 games because of this. Most of the time the people who surrender are premade and do what their friend does.