Donovan to me: Embittered, resentful, disappointed, jealous - and angry of Lestrade because he appreciates Sherlock more than her.
All her remarks like "psycopath", "gets off on it", "lunatic", "freak", "let you down", "stay away from Sherlock Holmes" serve the purpose to discredit Sherlock in the eyes of John (as the "newbie") and Lestrade and cannot be taken seriously in the substance.
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John: "Have you spoken to Mycroft, Molly, uh, anyone?"
Mrs Hudson: "They don’t matter. You do."I BELIEVE IN SERIES 5!