Savior-complex Stories

Kielo Flores woke up as Xaniel Everblack, the empires prince and villain of a well known book that he was reading. Which he hated because of the horrible writing, he hated how Xaniel treated everyone like trash because of his trauma as an excuse, and how the main character killed Xaniel in the most painful way possible. He knew and helped the author write the plot, but the actual writing? It was trash. He tried adding details to fix the plot holes but it didn't matter. Now that he's woken up as Xaniel will he make the correct decisions.. or not...? Will he be able to fix his "mistakes" only time will tell.