He's an uneducated child (says he's 14) who certainly doesn't understand anything that he's talking about or the expected conduct here. But I don't think he's being intentionally disruptive, he just doesn't know any better.
Indeed; he should definitely be given a chance. But anyone who cannot even be bothered to go and edit their darn message after being told how is certainly following the way of the troll.
Not sure if this is relevant, but I had been getting this error occasionally a while back when I tried to log in or submit a post. It didn't happen regularly, and waiting a minute or two and trying the action again usually solved the problem.
Your complaint against him is the same as your usual complaint. When you find someone saying stuff you don't agree with, you get angry. And when you see that they are using various debate strategies that you can't contend with, you get angry.