From Nick's viewpoint, are women in The Great Gatsby portrayed negatively?

Fitzgerald's portrayal of three principal female characters in The Great Gatsby through Nick's narration is indeed negative.  

Daisy Fay Buchanan emerges as a shallow, spoiled, and selfish woman.  Her less- than-admirable actions include abandoning Gatsby when she finds a wealthy man to marry, neglecting her child, engaging in an adulterous affair, and contributing to the deaths of Myrtle and George Wilson and Gatsby.  

It is fair to call Jordan Baker cold, self-absorbed, and dishonest. She is known to cheat in golf tournaments, and Nick observes her lying and gossiping from the first evening he meets her.

Myrtle Wilson--and her sister Catherine--are portrayed as cheap and vulgar. Myrtle is cruel to her husband in his presence and talks badly about him in his absence. She carries on an affair with Tom Buchanan, knowing that he is a married man with a child.