While 2010’s “Iron Man 2” featured the standard main antagonists in the form of Ivan Vanko, aka Whiplash (Mickey Rourke), and Justin Hammer (Sam Rockwell), the real battle in the film is that of War takes place between Tony Stark and the US Government. However, that battle is about morality rather than physical strength.
At the end of the original “Iron Man”, Tony officially announced his superhero identity to the world. Naturally, the government was very interested in having them get Tony’s suit technology, easily the most advanced military technology in the world. The only problem was that the former weapons maker had no intention of letting the government get their hands on his invention.
Tony insists throughout “Iron Man 2” that he doesn’t trust anyone, not even the government, with the power of the Iron Man armor. He fears that if the US Army gets its hands on a bunch of Iron Man suits, it will start a terrifying arms race, with other nations crafting more deadly weapons. Despite facing incredible pressure, Tony remained adamant with a gun as he declared in court, “You want my property? You can’t have it.”
https://www.looper.com/727951/the-best-decisions-iron-man-made-in-the-mcu/ Iron Man’s Best Decisions in the MCU