He's the one making big decisions, but his engineers probably determined that the whole thing is inefficient and it's better to built most of it from the ground up. So "what a jackass" is an autistic but witty way to get out of that trap.
I can grant you all that, all day. Again, he's probably a lot smarter than I will ever be, but my point of contention is that he sells himself as a know it all. As if he's the one coding, he's the one designing rockets and he's also the best gamer--It's obvious he's not. He's hired the best programmers, the best eng. and even the best gamer. He's a businessman, not Tony Stark.