I just wanna movie where Stan Lee just becomes like a main character, and he just gathers all the avengers and says, "I've been watching you for years." And they all just gape and Tony is just staring at him and Stan says, "You too Tony Stank."
oh. That.... Makes perfect sense. Steve looking for his old friend and Tony seeing the Person his dad put so much of his time and devotion into. The time he should have been putting into his son. I think when Tony first met Steve there was a certain element of resentment and anger.