I've known Selebus for a long time, and I know that the reason why Akira is so well written as a self-destructive character is because he himself is a self-destructive person, there's nobody else who can understand this feeling, but the funniest thing is that he's either completely oblivious to it or refuses to admit it.
He thinks he's a writing genius when all he does is take his own disgusting persona and mold it into what he wishes people saw in him: Someone who's "Misunderstood".
In a way, he succeeded. Akira is a tragic character, a disgusting and vile one, and despite all of it, everyone still likes him.
The tragedy of Selebus is that this is not a fantasy, and he himself won't be liked for his own unpleasant personality.