I'm grateful he kept his asshole personality. Most authors make a set personality then change it as soon as they can. Like here it most would have made him become a king of rats or something ridiculous. Mc only cares about evolving out of his rat form so it's obvious he should kill everything he can to level up
I often see a lot of people mess up with human-related word variations. In your case a reappearing mistake in your novel -> "peoples" should refer only to a "nation" :)
one -> person
many -> people
Does the grammar ever get better? This author has atrocious grammar, and poorly fleshed out storyline. I'm liking the premise, but it's painful to read...
thewayofKABOOMMMMM