I'm pretty sure they lifted a line from One-Punch Man about wanting to be A class heroes and not S-class, because S-class aren't human.
art is ok, post-fight commentary is good, but my general impression is that of blandness. nothing is horribly bad, but it's all over the place and lacks focus.

if the MC had any sort of internal motivation, it'd probably be better (then again, if he had that, he wouldn't be a 40-something years old empty husk), or if the power level was lower and there was an external threat to him.