Complex sentence: All the Sedgwick children had deeply conflicted relationships with their father Fuzzy--they adored him, but by most accounts he was narcissistic, emotionally remote, controlling and frequently abusive.
Split into simpler sentences: All the Sedgwick children had deeply conflicted relationships with their father (whom the children called "Fuzzy"). The children adored Fuzzy but by most accounts he was narcissistic, emotionally remote, controlling and frequently abusive.