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.
Baelish: Do you know what the realm is? It's the thousand blades of Aegon's enemies, a story we agree to tell each other over and over until we forget that it's a lie. Varys: But what do we have left once we abandon the lie? Chaos, a gaping pit, waiting to swallow us all. Baelish: Chaos isn't a pit, chaos is a ladder.