Unhappy Ending

Cue the Villain's evil laugh.

No matter how hard the Hero fights, they still end up dead to the hands of the Villain. The other good guys are horrified (if they themselves have not died along with the Hero of course), the Hero's Love is distraught (if they're alive), and The World Ends because the Hero failed.

In video games, this might be caused by the player causing the Hero to die because they suck at the game.