When Paul says that the character in his new non-Misery book swears a lot because, like him, they come from the slums, Annie immediately goes off about how SHE never swears, and so that must just not be a thing. Every creative decision that offends her palate is seen as a personal attack. Paul is barely human in her mind. He's more of a conduit through which God or the Universe bestows Annie with stuff she wants. It's a portrait of what happens when a person loves something so much that they start to hate it, because the real thing can never satisfy their hyper-specific tastes. The end result is, well ... what's a word for the extreme opposite of happiness?
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