First off, the complete arrogance is so off putting and its entirely undeserved. He acts like god's gift and this is coming from the "weakest E-rank" that was scoffed at by stronger hunters, but now that he sits at the top, he acts like a condescending twat. Awesome character development.
Second, no matter what he does or how he acts, no one second guesses him (for long) or even holds him responsible. In one situation, he rushes into a gate that he knows is a double gate, but instead of warning the people to stay the fuck out, he literally gives no info other than its dangerous inside and proceeds to enter. He encounters the current guild inside the gate, gets them to leave by saving them from imminent death and so of course, they proceed to get reinforcements. The reinforcements enter, half of them die and all because he couldn't say "stay the fuck out" when he should have known they would call for reinforcements and that those reinforcements would be lambs to the slaughter. Again, another incident where he could have avoided things going south but instead, the author decided to create tension by killing off nameless characters to make it seem like it was a dire situation when it never was to begin with, not for the MC anyways. But hey, at least he saved Lois Lane, right?
Third, he's fucking dumb. A bunch of huge ass gates open signaling the end of the world and he's the only one who knows why. So for several days, instead of telling anyone, he lets the world fucking burn... fucking seriously. People are rioting and shit which any idiot would expect from end of the world level shit, but this dumb cunt takes a vaca. So, he finally holds a conference to tell everyone and when people question him, he responds like a total bitch "believe it or not, I don't care" as if everyone should take his word for it... Because only a handful of people know him, he's shown a freakishly odd number of powers that no other hunter possesses, can speak to monsters and somehow, this is supposed to assuage all fears. Oh, right, he then scares the guy who asked the question into submissions which goes all the way back to the first point, he's an dumb asshole. When the gates finally do open, he's at the wrong one and instead of using his teleport (yes, he has this ability), he makes a casual call so build up tension. He could just as easily teleport to find out, but that would take away the build up and unnecessary drama, drama that can't be created when your MC steamrolls everything anyways.
Fourth, absolute shitty payoffs. For fucking 200 chapters, we get teased about his dad. Do you know what it amounts to? 1 minor appearance before he dies. Yes, he does save the MC, but its so anti-climactic, it was an absolute waste of the build up and we didn't even get to see anything out of him. Honestly, the entire story is that way. Early on, there was a thing about a slasher killing women, it's teased in a couple of chapters, but all it amounts to is the MC saving some random woman and then scaring the slasher to surrendering to the police.
In all, I'd rate this along with Im-Dal Young (author of freezing) as a palatable work, but mostly because of the art and nothing more. The story itself is just another isekai and the only reason it doesn't classify as an isekai is that they never "leave" their world and only enter dungeons, but gates are just portals to other worlds/dimensions so essentially they're one and the same. And like all isekai, the MC is given cheat level powers, is a total arrogant cunt and saves the world while pretending to not care so in other words, its as generic as fuck but damn the art/fight sequences are good.