Crispy thought it was a male child speaking to an abusive father - at the risk of some armchair psychology, that's probably projection. The music video tells a different story: a girl in small-town America, weathering bullies and saving up for college; sort of like a mini it-gets-better campaign. Is the young girl with short hair who applauds at the end a representation of Taylor herself, imagining the joys of city life (seen in the Chicago-esque stage and performance)? Probably, yes.
Edited to add: after a few more listens, the 'child (of indeterminate gender) speaking to an abusive father' theory is starting to grow on me. The references to alcohol, ranting in a bar, the probably-singular 'you' all conspire to prove me wrong. My apologies, Professor.