I hope Riot hires Brent back.
I've had games where people fed like crazy (sometimes on purpose just to troll, sometimes because they were just new to the champ, etc.) and basically dragged the team down.
Unfortunately, this occurs almost every other if not every single game that one does solo queue.
I've played ranked games where people try out champions, or just plain do so poorly that their entire team basically has to suffer because of one person. I'm not saying what Brent did was right, but there are some serious issues to consider on both sides.
There are many people like Brent who want to win whatever the cost. I fit into that category because I don't enjoy losing, especially when its not my fault. The matchmaking system can be a joke sometimes because you get that one person (or people) who cannot play the game decently. I don't call people names that are offensive on an epic level (unless they are trolling... like morgana with AD items -.-).
I honestly think that people should try out champs in a custom game vs easy bots to first learn their new champion before jumping into normals (DONT JUMP INTO RANKED IF ITS UR FIRST TIME OMG). Its frustrating when you get people who're like LOL FIRST TIME NASUS... in ranked.
Just my 2 cents... I just played a game with a Miss Fortune who was afk at our turret for 6 min, then proceeded to steal jungle from our jungler, and then went something like 2/14... then afk'd under enemy turret... That will piss anyone off, especially when the MF is like LOL U MAD KID.