It's definitely not just crafting..
He may not be roflstomping OP, but he is already far beyond average for that world, possibly top-tier "adventurer" level on a physical and magical level as well ( look at that INT score......)
The attitude of his wife and friends to whatever he shows, indicates that while our MC's power is not "normal" , it is also not really unheard of. High-tier, but not jaw-dropping levels.
In the end, we have about as much information about the world the MC finds himself in as the MC himself. Which is actually preciously little. And mostly shown through the .5 episodes which the MC mostly does not experience.
Some might hate this, but I feel it is one of the charms of this Manga, and gives a better feel for what the MC is doing to deal with the plate that is set before him.
The fun bit is that, given the chance, he would still rather use the Guild to deal with stuff he doesn't know or thinks dangerous, because it is safer to do so.
So far he's only directly killed monsters when he can't help it, or when he knows how he can accomplish it with minimal risk.
No-one's ever been able to make clear to him it is not normal to solo a snake like that, or any of the other things around him that seem to be taken in stride by his waifu.
Then again... no-one, as far as I remember the manga, has actually seen him solo one of those monsters. They just saw the end results and probably assumed traps, poisons, and other practical solutions from a "fortified" position.
They haven't seen him team up with "his" pack of Nightmare Wolves and tackle those things head-on... If he knows he can beat a specific monster, using [tactic X].
Even in the current chapter, his wife is Out of Commision and out of view when he OTKO's that water snake.. She probably assumes the wolves killed it or helped kill it.
