https://www.yahoo.com/sports/group-penn-state-football-lettermen-call-paterno-movie-uninformed-reckless-010357730.html
I'm including this quote because I think the players who say it "fails in every manner" got it wrong and are still blinded by undying loyalty. This movie got a lot right and that's what I liked about it. What I wish the movie had done more of is filled in more of Joe's early career and how he got to be lionized to the point that he became bigger than the University. I read the Paterno biography (a review is here https://www.nytimes.com/2012/08/21/books/paterno-by-joe-posnanski-a-biography-of-the-coach.html) much of which was written before the scandal broke, but the author followed up and there are some chapters dedicated to it. The movie matched much of the biography which is why I think the players who made that statement got it so wrong. The biography also adds a lot of context between Joe and Sandusky.
If you're just looking to validate a hot take opinion on Paterno, you probably shouldn't read the book. For anyone else, I think it is great read.