The MC is so average that it's boring. It's not entertaining, or fun...so why read?
I expected nothing more from an author seeking to craft so-called 'good-guy' MC. No ambition. No personality. Bland, boring.
It seemed like the author watched TVD. He was bothered by the fact that vampires drank blood and it didn't bother other people, so he decided to make this fanfic in retaliation. An MC who choose to remain human even when he was given the opportunity to become the strongest existence in the world.