Another one: Saving Mr. Banks.

P.L. Travers, the Mary Poppins author, was cheated out of creative authority on the movue and hated how it had nothing to do with her books.

The movie about her depicts her as a sad old bitter woman that needed Walt Disney magic in her life. That movie was a low blow by disney.

It also depicts her as living alone despite the fact she lived with a female partner, which is probably why they cut it.