For most Greek heroes, their most famous deeds were due to either wanting to become heroes or having to right some wrong. Hercules' most famous deeds were punishment for a horrifying act. His chief antagonist was Hera. Yet ironically it is thanks to her he became the greatest of heroes and a god. His name means "Glory of Hera" reflects this. It was her breast milk that granted him some of his great strength. It was her trying to undermine Zeus' plans that condemned him to a life of servitude instead of a life as a king resulting in far greater glory then he could have received as a king. It was her tormenting him his entire life that drove him to commit the deeds no other hero came close to matching. Hera made Hercules suffer his entire life by committing deeds that have haunted him through the ages. Yet it was only through his opposition that he became the greatest of heroes.
Do you think Hercules ever reflects on the irony of his greatest Olympian foe was in a way his greatest benefactor among the gods? Some lesser known versions of Hercules state Hercules did not commit the twelve labors out of punishment for his family, but to prove himself worthy of immortality. While Marvel followed the much more common version of the story either way, one can argue Hera did much more to make Hercules great than Zeus ever did. I am not saying this excuses what Hera did, but it kind of puts a slightly different spin on things.