People like you are why Hollywood pumps out so much shit every year. You missed the entire fucking point of the film. The protagonist of a film is not inherently a hero. They weren't trying to make you feel sorry for her at the beginning, it's the basis for her character's arc. She starts out hard-working yet relatively innocent to the harsher realities of intelligence work, so she struggles with the brutality of torture. Throughout the film, she slowly loses her own humanity over her obsession with capturing Bin Laden. She goes from being uncomfortable around torture to doing the torturing. She pins everything on Bin Laden, hoping he will right all the wrongs. That's why she breaks down in the end, at the realization that Bin Laden is just a man, and that his execution didn't really fix anything at all.