User blog comment:NeonSpotlight/I am NeonSpotlight, ask me anything :3/@comment-24430045-20140226182729/@comment-3308937-20140226183852

I think it really depends on things like summoner level, ranking/elo and queue type as to the attitude of the people you get teamed up with.

Overall I do believe that most players are friendly and willing to cooperate. I think a lot of the time when people say that League has a terrible community they're either lower leveled, play blind normals or focus too much on the 1 rager in their game and completely forget that there's 8 other people who are just trying to play the game.