Along with always contently competing to be the best, these two could never really get along because of their big egos. Steve truly believed his way of thinking was right, while Tony could only see his side of things.During Tony's first conversation with Captain America since 2015's "Civil War," Tony gets very emotional and gets mad at Steve Rogers. He puts some blame on him for running away and not wanting to register as a superhero with the government to possibly prevent the Thanos snap in "Infinity War" from happening.Steve Didn't Explain The Starks' Murder To Protect Tony & Bucky. The most likely explanation for Steve Rogers hiding Bucky's involvement in the deaths of Tony Stark's parents would be that he was trying to protect both of his friends.
Did Tony and Steve like each other : Steve is Tony's ally, teammate, friend and occasional rival in the Avengers. As for their social relationship, they might as well be considered as "frenemies" due to their personality clashes. However, despite their differences, they truly care for and respect each other.
Was Tony right or Steve
The brilliance of the story is that Tony and Steve are equally right and wrong. There is no clear right/wrong in the scenario that was presented. Both Tony and Steve are doing what they believe is right. Strong arguments can be made for both of their positions.
Why did Steve and Tony fall out : Their Antagonistic Meeting
Tony feels resentment over the way his father, Howard, compared him to Steve, and Steve assumes that Tony is selfish and unwilling to make hard sacrifices.
At the end of Civil War, Cap wrote to Tony and told him he understood why Tony did what he did, and even apologized to Tony for his role in the breakdown of the Avengers and keeping the truth about his parents' death secret.