Okay, saw the movie yesterday and was enjoying it pretty damn well....until the "twist" near the end was revealed.
So someone can correct me if I misunderstood what went on. The evil Russian guy who orchestrated this whole ordeal, was pissed off because his wife, son and father were killed during the battle in Age of Ultron (I haven't seen that movie)? So, understandably (well, to some degree), he wants to have the Avengers fight among themselves as neither he nor many other outside forces could take them on. Okay, fine whatever.
So in order to accomplish this, he digs through lots of encrypted files that were released when Hydra infiltrated S.H.I.E.L.D. in the Captain America 2, and finds out that Bucky was responsible for killing Tony's parents. He then does two things. First, he frames Bucky for the bombing at Vienna, and then goes on a hunt to find the remaining Winter Soldiers. After Bucky is found and captured, he somehow is able to infiltrate the government and pose as a psychiatrist to evaluate him (if this was explained, I might have missed it), and doesn't seem to be worried about getting caught with hundreds of security personnel around him.
Afterwards, he then lures Captain America, Bucky, Iron Man, and Black Panther to the Siberian fortress so that he could reveal the truth to Tony. Of course, the problem here is that there was no way he knew that Tony would be there (or any other Avenger besides Captain America). And if the ultimate goal was to enrage Tony to fight against Bucky and thus come into conflict with Captain America, why do it in such an immensely convoluted way? I'm just saying that this took way too many steps, with way too many risks, with no guarantee of everything working out as intended, when he could have just FedEx'd the tape to Tony's pad and called it a day.
And how did Captain America know that Bucky killed Tony's parents? When did that happen?