Iron man he successfully made a suit of armor nobody could replicate, created the first AI Jarvis, created nano tech armor, figured out how to time travel, helped establish the avengers, created vision and discovered two new elements. All of that was without any vibranium. Shuri failed to take a stone out of vision. Bruce banner failed to replicate the super soldier serum and became the hulk. And doctor strange wasn’t smart enough to not drive on a winding mountain road at like 90 miles an hour while raining. Tony made mistakes but he became the smartest by learning from them. He was smart enough to know that he would have to make the biggest sacrifice to save everyone.
