Mank, the new movie from director David Fincher, is a delicate dance between a love letter to the complexities and outsized personalities involved in Hollywood’s Golden Era, and a searing indictment of how powerful media titans warp public perception to further their own ends. On paper, Mank should be my favorite film of the year. It’s from one of my favorite directors, it deals with one of my favorite eras of history, and if you follow me on Twitter, you know I’m far too interested with political media, especially given the events of the past four years. …