10 Times Supervillains Were HUMILIATED By Regular People
4. Composite Superman Is Defeated By His Own Human Form - World's Finest Comics #141
With the Composite Superman being able to use the powers of Superman, Batman and several other notable heroes, it did seem legitimately possible that the villain would never be defeated, as the Justice League seemed unable to beat him.
Then fate took its course, and Composite Superman was defeated not by one of his enemies, but by his own frail human body.
After using his insane powers to their fullest extent, the toll taken on Joe Meach's human body knocks him unconscious when he returns home, and wipes his memories of having ever had powers. It's not the most badass defeat of all time, but it is one of the more interesting ways such a powerful character has been undone.
Though the villain does eventually return, for a good while his own memory stopped him from being just that - which is kind of like being defeated by your own human self.