The Mystery of Marilyn Monroe: The Unheard Tapes... It's All Been Heard Before
The film basically says she was a lost cause from the start. We don't get a sense of who Marilyn was.

After the author’s period of experimentation, these American notes are extremely straightforward. As in Migration, however, this America could be a more remote country, and the inspiration is avowedly Japanese (Basho’s Narrow Road to the Deep North). Implicitly, the film-maker compares himself to an old peddler of drawings, Sam, hawking his wares at the entrance of Columbia’s Butler Library.
The film basically says she was a lost cause from the start. We don't get a sense of who Marilyn was.
The relationship between the characters is what makes this film stand out, and it’s just all-around fun.
Where we leave the characters is in such a peaceful and optimistic place. It feels well-earned to ensure everyone gets their own specially-crafted happy ending.
The fun tricks used in the production design and lighting read extremely well on-screen but hardly fulfill their purpose of trying to inject glamour into a lack-luster story with nothing to say.
America is the crux of the storyline: she is the only person in existence with the power to jump between universes. As central as America is to the Multiverse of Madness story, she somehow didn’t get that much to do.