Review Detail of Mauve in The Great Journey With a System

I'm really sceptical about this novel. The story doesn't seem like it's going anywhere, and the plot is forced to proceed as the original, which makes it so disturbing. The system isn't most OP out there but still so OP. The world building is taken from the original novel, but described really briefly. The MC is mentally retarded and a freak (not a good way), he's so unlikable that he goes everywhere telling people about his system and someone's else sad story as his own, that even a child can tell that this idiot can't be the cool guy in his story. MC that talks so much explaining his every ability in every detail possible and its future developments isn't anyone's cup of tea.I literally had a headache following. I understand there's no need for "mystery" or "suspense" here, but even if you don't want, there has to be some so that it won't be as boring as it sounds.