why won?? why riot Promotes trolls¡¡¡

why the ponits are for win instead of mechanical, the game already do it, many of the framers and angry of the game come because the missplays of other players affect the personal performance, that means that if someone whan to be troll or someone are playing very bad that affect a lot, riot force to it and say that he tried to end it, It is like having a street without traffic lights and only punishing those who collide, why not riot attacks the real problem that causes a person to angst when playing?