It would seem that, for this work of fiction, the author took isekai MC power obliviousness to a frustrating extreme.
What kind of human is THAT dense to his surroundings? How is he even aware enough to survive?
I mean, he's dumb enough to work for a black company (the kind that abuse their employees to moral limits), based on him "staying awake for multiple days straight" and working in freezing temperatures while others collapse from the malfunctioning AC.
Not blaming the manga author, but the original writer.
At the very least, it's a fresh take on "OP ISEKAI MC ANNIHILATES ALL COMPETITION WITH BULLSHIT POWERS", especially since the MC is blatantly shown to lack 'typical' combat skills. (the average Japanese civilian isn't going to know swordsmanship.)