He is a sociopath. But more to the point he also suffers from a personality disorder. In his writing you see feelings of grandiosity as if only he can understand certain things such as logic - whereas in fact both his syntax and arguments are based upon his utter incompetence with any such study. An incompetence that he will always fail to see. He takes, as you note, delight in putting down others - imagining that his arguments have power or substance - all of which is due to deep seated feelings of insecurity due both to an inner knowledge that he lacks education and likely compounded by constant berating from his parents.

You can tell by his misuse of grammar and his cluelesness with regard to his various statements regarding the sciences (I am a former software developer and his statements about logic for instance are utter nonsense) that he lacks anything beyond a high school education.

In another forum he admitted that he has no job and relies upon government assistance so in addition to all the above he likely resents the success of those he sees around him and compensates for this by a false bravado.

In short, he is a failed human being suffering from various personality disorders and anti-social tendencies and it is highly unlikely that he will ever grow beyond this as there are no good treatments as yet for such things - none that he could afford anyway.

So he spends his time on the internet under various accounts and will likely do this until late middle age never growing and never having the kind of life that you and I have. But he's nothing special as he is just one of many marginalized and ill-equipped people that do such things.