“How do we love something critically?” That was one of the questions facing Sam Feder, director of the new Netflix documentary “Disclosure,” a sweeping examination of how transgender people have been depicted in film and TV, from the silent era to “The Arsenio Hall Show” to “Pose.” It’s a complicated history that’s dominated by inauthentic and sordid characterizations, with transgender lives as the objects of ridicule, disgust and violence.