The main elements in a vendetta short story are typically a conflict that sparks the desire for revenge, a character's determination to get even, and maybe some obstacles along the way. Themes could be about the cycle of violence, the limits of justice, or the transformation of a person driven by hatred.
Well, key elements might include a protagonist with a strong motive for vengeance, maybe an antagonist who has wronged them. Themes could revolve around the power of hate and the price of seeking revenge. Also, it might explore how such intense emotions affect the characters' lives and relationships.