L'histoire de Piera

How to appraise this drama? Very difficult task, the plot does not follow any logic, the family is irrational, the father is a man always busy and letting his crazy wife to do with her body whatever she wants, her girl seems to be more rational but at the end she also became as mad as her mother, her incestuous relationships with father and mother were evident, she was sometimes lesbian and sometimes the opposite. She even competed with his mother in sex. What was the objective of Marco Ferreri with this film? I do not know, the film finished and I was as empty as at the very beginning. Just a waste.