How many millions of years has he trained now? Him having the personality he does is just absolutely retarded. I mean unless someone else also trained as long as he has, going that long training with a sword would make just his reflexes and physical strength alone so overwhelming that no amount of talent or skill would compare. It's like they want him to be OP but at the same time want him to have the cliche hero journey of getting stronger to beat stronger enemies. You can't do both, it makes things just seem stupid.