A duelling character study, Kieran Culkin shines and delivers an astonishingly emotive performance, while Jesse Eisenberg's character shows what it's like to live in the colossal shadow of someone who can light up a room, the all too relatable position to be too afraid to step into the light yourself. This is one of my favourite roles for Jesse since the social network, his nuanced and complex character deftly switching masks throughout the performance. The film also deals with tremendously…