Hes just an imbecile.
The japanese style evades him because he's not smart enough to understand it.
japan has become obsessed with a superflat style which is basically the modern equivalent of American pop art.
yes killer7 is misogynistic, but its meant to be..its absurdly perverse..whereas gta is a game that tries to mimic real life. Gta endorses misogyny as commonplace and trivial, killer is dead is a commentary on it.