Fan Casting Shoot the Shaggy Dog in Sort by Tropes

As unfortunate as it is, sometimes an author will go one step beyond a "Shaggy Dog" Story, and Shoot the Shaggy Dog. They won't just let everyone die; they'll make the characters' accomplishments a moot point and their deaths completely senseless. They won't just have the protagonist die an agonizing death; they'll trap him in a grim cycle of reincarnation, and make them a failure in every incarnation. Sometimes they won't even kill anyone; the protagonist won't even get to bring the antagonist down with them, but the antagonist will win everything and go unpunished, even up to the point where the antagonist kills the protagonist instead in the most Cruel and Unusual Death yet.