You got a thick fuckin' skull, Kenneth.
Main points to back this up.
1) You defend his ass no matter what and you still have to convince him to help you find Clementine. (Episode 105)
2) "I DON'T KNOW WHAT THE FUCK YOU'RE SAYING, BUT I KNOW IT'S BULLSHIT".
3) Does not think plans through. Kenny would probably get everyone killed if he was the leader.