Summary of this manga: He was the WEAKEST, but then his cheat ability activated, and he became the STRONGEST!
I wrote that specifically to separate it from all other mangas that may or may not share a few plot elements.
So, he's been in the adventurer's guild for a full year because the guildmaster thought he might've had some potential, and then he spent a full year, with the title of Divine
Swordsman, never using his sword, and they're surprised he didn't improve?
Also, doing chores is contributing.
What kind of name is "Blue Fear" for a divine sword?
The sales price of those slimes doesn't make much sense compared to the price of the inn, unless those slimes are very common. Which at that condition they obviously aren't. And there are 34-35 of them, not 30.
Unrealistic. Do you know how hard it is to get fired in Japan?
You're more likely to get bullied so you'll "choose" to quit.