Review Detail of ApathyPotato in Reincarnated as an Archangel in the Omniverse

It reminded me of that fanfic where even at chapter 350 the main character was still a child of 6 years old, like at the beginning. Absolutely rubbish idea to write from the point of view of a child with adult thinking. I wonder what drives the minds of such authors? Why make the main character a child, with adult thinking, this is not Family Guy dude.