What do I do in this situation?
A friend of mine posted "Why me" in pre-game after gettting autofilled into 'Bottom', our teammate who was slated to play support locked in Xerath
(I don't understand how this works, but I've seen really good ones). He saw this in the chat & decided that this was aimed at him, so he decided that he was "Going to support top". He forced our toplane Singed
to go bot & play support while he played toplane, only to give the enemy Gangplank
an early lead. After the dying to the enemy toplane, he typed in chat "I'm going to support mid now". He then went mid & would take my CS & EXP. Singed ended up leaving Botlane to go back top, leaving our AD Carry unattended. I ended up leaving to go help botlane, Xerath taking my place (without asking). He constantly kept giving the enemy Zoe
kills more or less "played the victim" in /Allchat since the Jungler, AD Carry & I were all in a Premade. I didn't even say anything to him, yet he decided to just be a complete jerk the entire game (which was a Normal Draft Queue). At post-game chat, he stated that "For a premade, ya'll suck".