Naw.....AOU. set up civil war. Bucky may have been a decent part of CW but AOU was drawn out a bit to show the divide of cap and IM.
Tws delivered on all fronts. Movie started with him beating up GSP.
Civil war was just a nerdgasm. And really only 2 big scenes. Airport scene and Cap & bucky washing ironman.
The main conflict of Civil War, between Iron Man and Cap, started to be set up all the way back in Avengers.
The Accords themselves are literally the result of
every single film that took place before them, except for Guardians of the Galaxy, along with the majority of the heroes that took part in it. For Winter Soldier to take place you didn't need anything except First Avenger. For Civil War to take place, you needed all of the films that came before it, minus GOTG. Age of Ultron specifically led to the shift in ideology for Iron Man, thinking that heroes did actually need to be kept in check. But even then, his reasons for building Ultron at all, which led to Civil War, stem back to the events of Avengers, Winter Soldier, Iron Man 3, and even Iron Man. Civil War is a bigger payoff than even the Avengers was.
What "big scenes" does Winter Soldier have exactly? It's not some major action film, though it obviously has good fights. But if we're just talking action, Incredible Hulk has more "big scenes" than that film does. "big scenes" being present in a movie doesn't mean a damn thing in terms of which film is better. But when you've got Black Panther, Winter Soldier, and Captain America chasing one another through a crowded street, an airport fight scene with the majority of the heroes in the MCU, and a final fight between Iron Man, Captain America, and the Winter Soldier, I don't think you're hurting for action.
"Civil war was just a nerdgasm"
No, it was just a great film, plain and simple.
And this isn't to put Winter Soldier down or say that it wasn't great, because it obviously was. But Civil War was also just as great.