What makes you say that? To me it's clearly Japanese (the "-chan" by itself is a dead giveaway) and there's way too many open syllables to feel Korean.
My username does not have anything to do with Korea. It is a reference to a Japanese anime Giji Harem—it is really good and funny if you are into anime, I recommend.
>I currently think the opposite—that humanity is inherently flawed, and that the vast majority of humans will always live miserably.
His user name has a korean vibe to it. If my suspicions are correct then they could be exhibit a of the problem SK is facing.