Not only are most of your favorite comic book characters male, but the creators, the editors, and the illustrators of those comics are also disproportionately male. Comics are a place for imagination; the storylines are meant to make the reader feel transported into an alternate universe. Having so few females involved in the creation of these universes makes it difficult for women to really relate to these stories.
But this group of female editors at Marvel have something to say about that. On a milkshake break with a handful of her coworkers, one Marvel editor posted a photo of some of the boss ladies of Marvel. The sexist Twitter trolls, of course, couldn't keep their mouths shut.
The editor who posted the picture, Heather Antos, was understandably disheartened by how much sexism there still is out there, tweeting:
"The internet is an awful, horrible, and disgusting place."