Rhazvile's Revenge

"Life is cruel...so am I". These are the last words you hear before you die. If you're walking in the dark, don't say his name, because you'll immediately die. In a post-apocalyptic world, he is the leader of the most notorious mafia organization, who travels the world in anger and pain, looking for his victims. A man mercilessly tortured by fate and then unleashed on humanity. His fate is complicated by a demon who grinds his brain because of his past mistakes. He was tormented across multiple universes because his best friend stabbed him in the back. Maybe by the end of the story we will sympathize with his actions.