Steve was never Tony's childhood hero
This is another "pity poor woobie Tony" story, which suggests Steve was being SO mean by pointing out Tony's wrong choices because Tony couldn't handle being criticized by his childhood hero. It also had that Tony was "trying his best" and Steve "ruined everything Tony was working for" and "stole the spotlight" from Tony. You have to wonder what films this prop-Tony person was watching, because it definitely wasn't canon.
Note: Set during Avengers 1.
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Tony sneered at Rogers' back, saying, "I can't believe that's the guy my dad kept going on and on about. They should have left him in the ice."
Bruce frowned, but didn't comment on how awful that was for Tony to say. Instead he said, "So you didn't look up to Captain America when you were little?"
Tony huffed and said, "HIM? Red, white, and blue do-gooder? Not likely. That jerk was DEAD and he still stole the spotlight from me. He ruined everything I worked for. My dad would always ask what I spent my time doing and was it helping anybody but myself. Because apparently Rogers was a hero with a heart of gold that made my dad go weak at the knees."
Bruce thought about how Steve Rogers had reassured Bruce that he was welcome Bruce exactly as he was. And how Tony seemed ready to belittle the captain every chance he got. He looked directly at Tony and said, "Well some of us DID look up to Captain America as kids AND adults. And I think getting to know Steve Rogers would be even better."
He turned back to the computer and said, "So your dad and I are in perfect agreement. I suggest you shut your mouth and get to work."