Yeesh, people are harsh. It's only a few short chapters so far, but I've been having a lot of fun.
The MC's personality doesn't have much to speak of yet, but that's not the point. The joke is that this overpowered person with a plain view of the world is in a world where there are apparently tons of people who fancy themselves the main character and have backstories and powers to match.
In other words, the One Punch Man joke. I've been laughing at the same joke so far, so until something really dumb happens, I'm going to say I like this story.