Sapped of color, sapped of soul, built along a clumsy narrative path that gives more attention to the men surrounding Christine Collins, letting them tell us how inspired they are by her, without actually showing us her fighting spirit beyond histrionic outbursts. This is bourgeois "feminism," avoiding any real indictment of the misogynistic system in favor of individualistic bullshit seeking to redeem the system and the men in it. They show you the system scapegoating, then double-down on it within the narrative. It's a neat bit of cinematic prestidigitation, trying to guide you with statements providing a false sense of empowerment, all the while silencing the central character in favor of these cut-jawed machos, sniveling psychopaths, and moral demagogues.
You're better off watching the BuzzFeed Unsolved episode on this, and that's saying a lot.