As long as the injury is not serious, Captain America can really stay at his peak, but Captain America is still a normal creature. Even though its physical strength is extraordinary, it is still far from the indifference of Thor and Hulk to hot weapons. Even the captain of the United States with a large caliber bullet can't resist by body. After the cartoon "Civil War" ended, Captain America was seriously injured by pistol bullets and died. If Iron Man really dies, he can openly show his contempt for God. Iron man's round battle, bombing captain America from the air in turn, is a dimension reduction blow. Captain America can only resist defense, not attack!
If Tony really committed suicide, how could Captain America defeat his armored squad and the anti-Eagle series? Anti-Raytheon armor, anti-Phoenix armor and anti-Wan Ciwang armor did not appear, but they all existed in comics. Although captain America is very strong in the battle and claims to be from the fifties, it is not absolutely impossible to crack.
In Captain America: Civil War, Iron Man cracked Captain America's movements with artificial intelligence and directly knocked him to the ground. There are many such artificial intelligence Iron Man families. Although Iron Man is a genius in science and technology, his leadership in this respect is definitely not as good as that of the captain. So even if Iron Man is better than the captain, it is normal for both of them to lose in this case. So in my opinion, if Iron Man and Team USA are serious, the biggest possibility is that both sides can't tell the winner from the loser.