I usually loathe the MC who never gets a clue and is living in their own naive reality. But, this story makes it work, because both the real story we the audience see and the imagined story in Lin Jie's head are compelling and interesting stories. Its not just the MC being a whiny coward thinking he's weak when he's actually the strongest ever. In fact everyone thinks he's crazy powerful, but he's actually totally weak, and he knows it. Though there are subtle hints both ways about whether he actually has power unbeknownst to him from the dark god, or if he's just a vessel for his miracles.