system
Given the following post, respond as if you're commenting on Reddit:
human
[Civil War Spoilers] Why didn't Iron man just X?

When Iron Man, Cap and Bucky fought for the last time, Iron Man was getting defeated by Cap, after he blew Bucky's arm off. But as a counter, he had Friday analyse the fighting technique of Cap and defeated him easily. If it was this effective, why didn't he do that earlier?
gpt
Even if Tony is a genius who can build sentient A.I. which can adapt the suit to certain fighting styles, it looks like Tony is kind of a test pilot for his own inventions, like in Ironman 1, when he actually tries how high he can fly, almost killing him in the process.

I think this 'feature' of the suit/Friday was just a ~~Beta~~ Alpha version, he had never tested it, and kept it as a 'Joker', which might as well fail badly. He just relied on safer/tested methods until that point.

That it worked so well was pure luck. When Spiderman fought Captain America in the comics, he also thought about how he 'studied Cap's fighting style', only to get obliberated by Cap, because 'it is not a fighting style, it is just one long, perfect movement' (not finding the quote, but that was the quintessence).