
Both characters have something they're hiding from their past especially their queerness and so they resent others and themselves for it Both are evil and very masculine
Sorry I'm not good at conveying what I'm thinking but those are just a few of my thoughts. Also some of this info comes from my knowledge of the novel and yeah

Oh okay yeah i see what u mean. Like this massive rejection of a part of their identity that makes them act wicked to the ppl around them.
In ML case id say instead of lashing out because of inner rejection/turmoil like Nate, hes purely seeking revenge against his abuser in the most criminally sinister way possible.
2 sides of the same coin maybe (nate and MC i mean)
Jiwook's character reminds me a lot of Nate from Euphoria