Complex sentence: Marianne is painted as a morally ambiguous character with both good (focused, honest and straightforward) and bad (manipulative and very possessive of Francis) sides, less malicious than Rosemary or Herman, but still not completely good.
Split into simpler sentences: Marianne is painted as a morally ambiguous character with both good (focused, honest and straightforward) and bad (manipulative and very possessive of Francis) traits. She is less malicious than Rosemary and Herman, but still not completely good.