Movie of Alive: Bad acting?

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Is anyone familiar with the true story of the Chilean Soccer team that, in the 1970s, crashed their plane into the Andes and were forced, from the subsequent lack of food, to turn to cannibalism? A book by Piers Paul Reid based on this story was written excellently and later, about 20 years ago, a movie called "Alive" was made about the true story. I read -on YouTube- "reviews" of the movie; the almost throughout general agreement is that the movie is corny and in a lot of areas full of bad acting. There is one scene where a woman gets hurt in the crash and for hours screams from her pain. The other survivors are emotionally wrecks and her screaming causes one to tell her if she doesn't shut up he'll punch her in the face. The next day she dies and that boy says he is so ashamed of himself and cries like a child. Viewers say this is corny and horrible writing but have many people been stuck in the positions the Chilean survivors were in? Do they know what it is to have to eat their own dead friends' bodies and feel rather morally degraded (not that they weren't completely correct in their actions in my opinion)? The survivors probably acted just as disoriented and "corny" as the movie shows. Rather than being told it was bad acting and bad movie script writing the actors and writers should be applauded for portraying with some accuracy what it would be like to be in the survivors' emotional and physical positions. What do you think?