Movies have not often portrayed psychotherapy accurately, usually including fanciful mysteries, murder, or romance between doctor and patient which, though rare, is illegal outside film. I recently watched the classic (1962) "David and Lisa," and was struck by its accurate depiction of the psychotherapy of the severer adolescent disorders. The doctor was empathic, understanding, and accepting while the patients were driven by unconscious impulses deriving from long-term parenting mistakes done unknowingly.
What was clear in the film was that the unconscious is powerful and personality change is not easy or quickly done.
While the film's acting and script were superb, my unexpected deep emotional involvement with it likely derived from my work in a similar treatment setting many years ago and described in my first book, "Troubled Children/Troubled Parents: The Way Out," which contains its own dramatic stories including that of a clinician who secretly married his much younger patient. "David and Lisa" is likely available online or in your library. Watch it!