The actress for the White Witch agrees with me:
INTERVIEW: Tilda Swinton, The White Witch of Narnia Speaks! - MovieWeb. Why is Jadis so angry?
Tilda Swinton: I didn't see her as angry. She's interested in dominating absolutely and is irritated that there is this prophecy that says sooner or later four humans will turn up and make trouble for her reign. She wants to get rid of them fast and it's all going a bit wrong. She's confused and irritated. I don't see her as particularly angry. Have you read ‘The Magician's Nephew'?
Tilda Swinton: I hope they make it. It's a prequel that explains where Jadis came from and how Narnia is created. She's so bad that she destroyed her empire to spite her sister. There's this one deplorable world, which we don't know what it is, that if it's spoken; everything is vanquished and she's the only one alive. She does it to spite her sister. She just wants to dominate. The idea of anybody having anything over her is confusing.
This obviously means that my analysis is correct. There's no stronger form of authority than that of an actress.