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Actually, a number of directors refused to work with him and even when he had made a name for himself, Coppola had to fight Paramount to hire him for Godfather because he had such a reputation as a nasty individual. This is all congruent with Tarita's claims that he had violent mood swings. Bitter? I suppose she was! You'd be bitter too if the person you fell in love with proceeded to mentally and physically abuse you for ten years, I bet.