He's a known idiot. He also rages a lot.
here's some answers to the most common questions about him
1. why does he rage a lot?
answer: he could have IED, intermittent explosive disorder.
other answer: he could just be a general handicap.
2. how is he 21?
answer: it's easy to lie about your age on the internet.
other answer: he's just extremely immature in the head