I haven't read this book yet, but the argument that one should ditch the film halfway through doesn't hold much water with me, because there is always the CHANCE that
1) it may improve by the end, or
2) something which disgusted you may be proven to be a satire or a pretence
For example, I read John Buchan's THE THIRTY-NINE STEPS recently, and was dismayed to find an argument in the first chapter that "the Jew" was behind World War One. According to one character, this was the "true" cause of the global conflict.
I *could* have ditched the book at that point, under the "at least I save my time" argument, and gone through my life thinking that Buchan was a horrible anti-Semite. Instead, I read on, and found out later that when the character blamed "the Jew" for WWI, he was clearly lying. The character was using a scapegoat to conceal his real intentions.
So Buchan certainly did NOT endorse blaming "the Jew" for WWI... But I'd never have discovered that, had I not read the book all the way through.