system
Given the following post, respond as if you're commenting on Reddit:
human
[Superheroes] Most Superheroes have to fight a villain in their origin stories before moving onto bigger and badder foes. Which established heroes would still struggle against that first bad guy?

Has the bad guy grown in skill right along with the hero?  Did the hero just get lucky in that first encounter and the villain is still formidable?
gpt
Part of All Might’s origin was that his nemesis, One for All, killed his master. They would continue their fight for years until All Might spends every last drop of his power to stay alive, defeat All for One and teach his successor. It is worth noting that his nemesis is still alive, but in custody. Who knows for how long more. 

The Fantastic Four and Doom seem to tangle pretty evenly ever since their start. As does Charles Xavier and Magneto.