it's not about cunning vs brutality. it's about the author streamlining his progress without the character facing any real obstacles. no one challenges him, he never has to step back, change course of action or even having someone talk him down.
he's been unstoppable since the first episode, without anyone to rival him.
oh, and the current manwha chapter has him make another bet with an authority figure, and saying he could reach X strength in Y time, learn some new plots, dammit.