Fixing a Failed Ending

At some point, I realized that I had possessed an extra in a certain novel that set the internet ablaze with its disastrous ending. Would you believe it if I told you the protagonist turned evil, destroyed the entire country, and that was how the story ended? Then, would you believe that the reason for this descent into darkness was the death of his close childhood friend? And if so, could you believe that the cause of that childhood friend's death was actually death by overwork? All of this was the ending of a single novel. And having possessed Blen, an extra destined to die later on, I make a decision. I will rewrite this ruined ending. I'll prevent the death of that childhood friend...