That's honestly the only thing I remember. The mc was an og guy who got the attention of gods by killing monsters as a normal human. He gets an unbreakable shovel as a weapon and there's also this monster that for every human its fighting, it grows another blade. Thank you all. Edit : Found it, was called 'Is this hunter for real'
Only one that I know that uses shovel(that fit) is "The invincible Shovel" (aka scoop musou) novel, There are other but that one the person using it is a sheep girl.