Tony had no problem asking for help in Iron Man 1. That was Iron Man 2. In Iron Man 1 he had help building the first suit in the cave, was reliant on Stane to smooth things over with the board, asked Pepper to sneak into the company to get info, and was dying to show off his suit to Rhodey. The themes were about taking responsibility for one's actions, not letting people in. In the sequel he had that problem because he was dying and didn't want anyone to know, and his overcoming that is what led to him being able to get together with Pepper and work alongside War Machine at the end. That is where it is "black and white and obvious."
The themes of Iron Man 1 are also "black and white and obvious," and are missing in that final battle. Tony doesn't take what he learns over the course of the film to win. He pulls out a deus ex machina. It's not a matter of the fight not being flashy enough. If the fight had the emotional and thematic weight it should have had then that wouldn't matter. The Luke/Vader duel in Return of the Jedi has terrible choreography and on its own would be a boring fight. But the thematic and emotional weight of the confrontation between father and son is so strong that it doesn't matter. Iron Man 1's final fight makes the fight ridiculously lopsided and yet doesn't have any stakes.