Iron Man Tony Stark, who had fallen into a state of paranoia, created the ultimate middle-school-syndrome patient: the Ultron robot.
Tony's primary purpose in designing Ultron was to achieve peace.
Ultron came up with a method to achieve peace—annihilating all of humanity.
In executing the plan, Ultron failed to truly destroy all of humanity, but he did wipe the country of Sokovia off the map.
Colonel Zemo was from this country, and his entire family was in Sokovia.
Colonel Zemo's nature was selfish. When Ultron attacked Sokovia, his first reaction was that as long as his family was safe, it was fine.
That was human nature and completely understandable.
After his family died in that turmoil, he resolved to take revenge.
He spent a year weaving a large net, drawing the Avengers members into his snare.
He was very clear that he was just an ordinary person and could not fight head-on with the Avengers, who could fly and leap across the land.
So he did not plan to exact physical vengeance on them; he decided to hurt them on a psychological level.
He would fracture the Avengers and let them kill each other.
His revenge was pure—purely for the sake of his family, not for Sokovia.
Precisely because he was selfish and cold-blooded, he would stop at nothing to get his revenge.
Whether it was manufacturing the explosion that killed Black Panther's father or killing an innocent psychologist, he hurt many, many people and families, creating countless pitiful people who had lost everything just like him.
He was a very focused villain.
He spent a year cracking codes and studying the weaknesses of each Avenger in order to achieve the internal subversion of the Avengers.
Colonel Zemo had an exceptionally formidable grasp of human nature.
Inside the Siberian base,