MCU Villains That Were Created By Heroes

List Rules
Vote up the villains who prove MCU heroes should think through their actions a bit more.

It's a classic storytelling trope, but when it comes to the MCU, it seems like there's a high volume of villains created by heroes menacing the planet. To paraphrase Harvey Dent, "You either die a hero, or you live long enough to create a villain that's way more dangerous than what you became a hero to stop in the first place." In the case of Iron Man, you spend most of your free time giving people that final push they need to break into super-villainy.

Villains normally have sob stories to get the viewer at least somewhat on their side. If that origin involves the titular hero, well, even better. In this list, you're going to see all the MCU villains that were created through the lies, deception, inaction, and stupidity of the Marvel Universe's heroes. Once you read the list, you can decide for yourself if the universe truly is better with all those Avengers flying around.


  • Tony Stark And Bruce Banner Literally Built Ultron
    Photo: Avengers: Age of Ultron / Walt Disney Studios Motion Pictures

    There's no other way to look at it: Tony Stark and Bruce Banner were directly responsible for all the destruction caused by their AI creation. Throughout the Marvel films, one of Stark's most commonly exploited beliefs is how badly he wants to protect the people of Earth and the lengths he'll go to to make them feel safe. 

    When Stark first briefed Banner on the possibility of creating Ultron, it was hard to imagine their plans not going wrong from the jump. It was clear to both of them how potentially dangerous the project was, but Tony knew if they took a moment to consider the danger, he'd never be able to go through with it. A tight time frame to use Loki's scepter forced them to go into the project without fully considering the ramifications, which turned out to be planet-threatening. As Ultron said, "I know you mean well, but you just didn't think it through."

    1,078 votes
  • Odin's Ruthless Past Turned His Daughter Hela Into A Villain He Couldn't Stop
    Photo: Thor: Ragnarok / Walt Disney Studios Motion Pictures

    Odin led the seemingly peaceful kingdom of Asgard, but like the kingdoms of the real world, it stood on top of a long and bloody history. He amassed his power through vicious conquests, fighting alongside his firstborn child, Hela. He raised her to be a bloodthirsty fighter, as that furthered his goals at the time. 

    When his goals changed? Well, his desires began to conflict with the still-bloodthirsty Hela. Instead of being a good dad and helping her grow or evolve as an Asgardian, Odin banished his daughter, causing her hatred for the family to grow. When she eventually broke free, her quest for revenge resulted in Asgard's ultimate destruction. 

    920 votes
  • Odin Created Loki By Favoring Thor Throughout Their Lives
    Photo: Thor / Paramount Pictures

    Odin took Loki from the Frost Giants after laying siege to their kingdom. On the one hand, Odin wanted to give this baby a life instead of letting him perish alone, but on the other, Odin hoped to use the child for political gain, thinking that having a Frost Giant as his son would help him unite the kingdoms in the future. 

    When Loki confronted Odin in the first Thor, you could see the pain Loki had carried with him throughout his life. As Loki screamed at Odin, he revealed the persistent pain of watching Odin favor Thor. While adoption can be a beautiful thing, it turns sour if you're going to favor your biological children and make your adopted one feel lesser. In this environment, it's no wonder that Loki grew up resenting the family and Thor most of all. 

    798 votes
  • Erik Killmonger's father, N'Jobu, was the brother of the former king of Wakanda, T'Chaka. After going to America, N'Jobu became enraged by the hardships the Black community faced outside of Wakanda. When N'Jobu went against the will of T'Chaka to try and use Wakanda's resources to help groups outside of the reclusive nation, he perished in a confrontation with his brother

    Killmonger, the American-born son of N'Jobu, knew firsthand the struggle of being raised outside Wakanda. He decided to take over Wakanda to use their power to help the world outside of its borders.

    784 votes
  • Karl Mordo Grew To Hate Magic Users After Discovering The Ancient One's Lies
    Photo: Doctor Strange / Walt Disney Studios Motion Pictures

    Karl Mordo served faithfully under the Ancient One for years. He felt as if he were one of the Ancient One's most trusted students - a peer even. That's why it crushed him so much when he found out the Ancient One had been drawing power from the Dark Dimension, something long forbidden from the rest of the Ancient One's students. 

    Doctor Strange's post-credits scene set up Karl Mordo's next stage in life when he explained how he finally discovered the core problem with the world: too many sorcerers. 

    632 votes
  • Tony Stark's Terrible Management Skills Radicalized Mysterio
    Photo: Spider-Man: Far From Home / Sony Pictures Releasing

    In Spider-Man: Far From Home, Tony Stark wasn't only responsible for the heel turn of former employee Quentin Beck, but also an entire network of former employees happy to join Beck on his evil mission. 

    Tony may have excelled at being a billionaire playboy genius philanthropist, but he wasn't a very good boss. As explained by Mysterio himself, Tony Stark constantly took credit for the inventions of his subordinates. The final straw for Beck and his associates was when Stark decided to give the EDITH security system to a teen (Peter Parker) instead of someone from the company. 

    If it was just Mysterio who was angry with Tony's actions, that could be chalked up to Beck's ego. But to create an entire group of evil scientists and analysts? Tony needed to go to management training or at least implement better personality screenings in his hiring processes.

    728 votes