Review Detail of Rooz in The Porter is Secretly an SS-Level Hunter

I found it impossible to suspend my disbelief. Nowhere near enough info about how dungeons work, how people enter them, who's monitoring them, required permissions etc. Character development and motivations are also lackluster. So you have an MC who is tired of hunting in the dungeons, and what does he do after retirement? You guessed it, hunting in the dungeons. Except now he's supposed to be carrying stuff around, yet he keeps getting involved in fighting anyway. All but one of the hunters die in the dungeon, yet all of the carriers survived? Nah, nothing suspicious, nobody investigates stuff, business as usual. MC wanted to spend more time with his kid, but he keeps dungeon hunting at every opportunity, even if it means leaving his son with his recruiter whom he barely knows. Who accepts it without complaint for some bizzare reason.