Cersei has always been a complicated antagonist on Game of Thrones. Though we may understand and even sympathize with her motives, we still know her choices to be twisted and ultimately wrong. As the seasons progress we see her descend deeper into her own darkness until this past season when her own cruelty truly reached its apex. In the first season, with her long, golden locks and drapes rose gold gowns, she looks like a classic fairy tale queen. This past season with her shorn hair and gothic outfits her inner darkness is truly brought to the forefront and there is no doubt that her fate as a villain has been sealed.
Tyrion: Let me give you some advice bastard. Never forget what you are. The rest of the world will not. Wear it like armor, and it can never be used to hurt you. Jon: What the hell do you know about being a bastard? Tyrion: All dwarfs are bastards in their father's eyes.