The author needs to do more to develop the MC. He's constantly being portrayed as a victim or the weakest link. Makes for a very one dimensional character an very uninteresting especially in an apocalypse. Like he needs to develop some grit or spine by now after all that has happened. I think it would be more interesting to go through the story from Guwon's point of view.
I'm not super invested in the story, but I just find there's so little chemistry between the MC and ML? MC is just some a doormat who let things happen to him and a passive character in the story, letting others dictate his actions. I don't like the characterization of the ML either he's just don't have a likeable personality or maybe this apocalyptic story setting isn't doing it for me.
They are either fucking or having a flashback every other chapter. Like after 20 chapters of this, it's getting boring.