He's hitting it... specifically in its steel jaw. That's like targeting the place where your attacks would be the absolute least effective possible... Is the author trying to make some kind of statement about protagonist intelligence or something? Because this is bizarrely consistent.
Why does this have a 9.34 rating? Is there a bug which happened because too many people rated this 1 or something?
I wonder why the inventory was shown as being empty in ch12, page 9, when now it seems to retro-actively have that weapon in it?
Actually, if the author actually does have him eventually reach 100 IQ (approximately average human intelligence) through increasing the intelligence stat, I would gain a smidgen more respect for this story, because that would actually mean there's an in-universe reason why these people are so dumb.