I imagine it is a case of frustrated expectations.
When a person hears that $BOOKNAME by $AUTHOR is being made into a movie, that person probably expects the movie to be a faithful adaptation. That expectation is magnified when the original text carries some personal significance.
Seeing that adaptation become a parody---one that overlooks or mistakes key aspects of the original work---crushes those expectations. At that point, the producers have misled the viewer and replaced the treasured story with one of their own.
In this particular case, Verhoeven could have written his own story to expose his views, but instead he preferred to leverage the notoriety of a third party. It is dishonest in addition to being disappointing to anyone who enjoyed the original work. That, I believe, is the "Bingo."