DIRECTOR David Fincher is not helping his movie “The Curious Case of Benjamin Button” with his imperious ways. “We are working our asses off trying to get Oscar nominations, and he is so abusive that it’s crushing,” said an insider at Paramount. “Whatever we do, it’s not enough.” After an LA screening, Fincher was rude to John Goldwyn, who was running Paramount in the early ’90s when the movie, based on a short story by F. Scott Fitzgerald, was first in development. After Goldwyn congratulated Fincher, “he hit Goldwyn in the chest with his hand and hurt him and said, ‘That’s for you, for not greenlighting the movie when you had a chance.’ ” The picture, which shows Brad Pitt aging backward, relies on computerized effects that didn’t exist 15 years ago. Our insider said, “If we never hear the name David Fincher again, it will be too soon.” A Paramount rep said Fincher was in Britain and couldn’t be reached.