I haven't seen the movie (yet... and probably will never find time for the book). I therefore will not comment on the substance of movie. I note that some of the harshest critics who branded it as inaccurate or a hatchet job or whatever ... could not be bothered to actually see the movie before forming what they believed to be an "informed" opinion about it. Others, who HAD seen the movie and who were asked to identify the specific inaccuracies, pointed out trivialities.
I'm reminded of a few past works that were similarly dismissed as fantasy. One was "The Final Days," Woodward & Bernstein's account of the events leading up to Richard Nixon's resignation. Nixon drinking, Nixon talking to himself, Nixon saying uncomplimentary things, Nixon praying with Henry Kissinger. All of these events were denied. And later, admitted. Although he was not the source for the book, Nixon himself later admitted that the tale of prayer with Kissinger was pretty much true (implying either that Kissinger was the source or that Kissinger blabbed about this highly personal incident to others).
I'm also reminded of the movie about
Ronald Reagan that was heavily criticized by people who hadn't seen it. Those who were asked to identify any particular inaccuracies could not do so; they simply spoke in generalities like, "That's not the Ronald Reagan I knew."
The same pattern occurred while Reagan was actually president. Reported stories were denied as false, and news agencies (sometimes to defend themselves and their journalistic integrity) showed footage proving that they were telling the truth. Despite White House denials, Reagan HAD called some people "sonsabitches" in public. Despite the President's denial, Nancy Reagan HAD fed her husband an answer when he was stumped by a reporter's question. Despite his denial, George H.W. Bush HAD used the term "voodoo economics" to describe the economic models he would later be required to support. It goes on and on. Some folks cannot distinguish what actually happened from what they wish had happened.
So, when it comes to charges of dishonesty or inaccuracy in a movie or book or TV show, it's put up or shut up. Point out what's in error and show us your proof. Otherwise, you've got no credibility.
I've pointed out that there are movies that I deem historically inaccurate in several ways (including "Braveheart," "Apollo 13" and the grand-daddy of all B.S. History, "JFK"). In each case, I am able to say WHY these movies are inaccurate and identify support and evidence for each assertion.