The legs up to the waist look fine, but I don't believe the fingers on his right hand should be facing the viewer. The torso being hidden within the upper portion of his seemingly-oversized gi gives the illusion that his chest lacks any sort of muscular definition. That alone wouldn't be a problem, except this Akuma also has a rounded, chubby face and his neck is completely hidden by Goutetsu's prayer beads, rather than hanging down his chest a bit. It all makes him look more like a teenager cosplaying as the guy. There's a lot of official artwork for Akuma though, and the proportions of everything on him changes with each piece, so it's difficult to pinpoint which one(s) you referenced for your illustration (I know it's not lion's mane Akuma in SFV, at least).

I didn't peg you for a Street Fighter fan. Is Akuma whom you usually play as or do you just like his design? For SFII, SFIV, and in various spin-off fighters, I preferred using Zangief. I didn't touch SFV. That game was a mess at launch and wants too much money for its cosmetics. I got SFIV in a Humble Bundle, or else I wouldn't have played it, either.