Being boring is bad, and not in a good way. (Now with more Civil War!)
Warning: The following contains SPOILERS for every movie released by Marvel Studios.
Adam B. Vary for BuzzFeed / Marvel Studios
Malekith (Christopher Eccleston)
Thor: The Dark World
Yeah, he wants to transform the entire universe into absolute darkness, but that and his freaky blue eyes are pretty much the dude's only defining features. I guess when you're in the same movie as Loki, there is just no competing. But, really, Malekith could not be more boring, and, I repeat, he wants to destroy the universe. When you are The Big Bad for an entire superhero feature film, the sin of total boredom is unforgivable. There is nothing worse.
Marvel Studios
Vice President Rodriguez (Miguel Ferrer)
Iron Man 3
He conspires with the Mandarin and sells out the president — and, worse, Tony Stark. So he's definitely a bad guy. But, to be honest, I totally forgot he was even in the movie. Because he's on screen for less time, though, he evokes less boredom than Malekith, so he's not quite as terrible. But only barely.
Marvel Studios
Mitchell Carson (Martin Donovan)
Ant-Man
This high ranking S.H.I.E.L.D. official who is actually a Hydra weasel wants to use the shrinking tech designed by Hank Pym (Michael Douglas) to rule the world. Since Pym did make a memorable impact on Carson's face, however, he's more interesting than the previous two villains on this list!
Marvel Studios / Via marvel-movies.wikia.com