How much of this is actually claimed to be factual?

I watched this film recently and thought it was quite well written and acted. Having researched a bit I am sceptical as to how much is meant to be fictional and how much is supposed to accurately represent the relationship between Tippi and Hitchcock. I've already seen the real screen test Tippi did on youtube, and even that's made to appear more menacing in "The Girl" than it was in real life, so I wonder what else has been exaggerated. Does Tippi actually claim that in real life Hitchcock forced himself on her and pressured her to be "sexually available" to him? All I've seen her say when interviewed about it is that she believed he was obsessed with her because of the way he looked at her while filming.