@VincentYamato it's worse than that, he got those powers in the most ridiculous and impossible way. By defeating the few sporadic invaders that manages to come to our side.
Which means that he has a cheat that multiply his EXP gains by thousands.
Everything about this story is badly implemented, more importantly how is it that he can simply counter godly skills?
Even if he just grew by fighting, that doesn't make any sense. How can a god simply give away a power that makes an individual stronger than other beings that belong in his very same domain?
Luckily this story is so bad, so garbage, that it's fun to read.