@Chocoffee First off, I'm not attacking you personally to go like that at me.
Second, the only reason the MC is not dead, is the unfair power of "knowing the future by having read the novel". So he behaves like an asshole, because he can.
Third, if you haven't noticed, the only reason human kind has been able to survive is because our numbers and how each individual brings something to the equation. Doesn't matter if MC knows how things work if the idiot can't find a source if food and water (he will be done in days) and let's say one of the killed people was an expert hunter or gardener, well now he is F. You would say, its a city food is there. Sure, dude, canned food lasts at most 3 years, then what?
Fourth, MC lacks leadership skills, in a scenario of end of the world and having that sort of power, you try to make the most of it by leading people onto it. What? you think this asshat is a one man army? Besides, the monsters there clearly want to divide, have you ever been a tactician? I guess not. Divide and conquer.
Anyway, have a nice mental breakdown kid.