I personally don't see men treated better.
The only character who has been always positive is Lennox, and in many situations he was not even there because he had to do the baby-sitter or he was injured, and now he is dead.
Then we have Hermes who betrayed Diana and was forgiven by her. I'd say positive turned negative and then again positive.
Haephaestus who helped her and then helped also Strife for some reasons.
Eros...except for the fact he took them to his father, he didn't do anything.
The soldiers in Lybia, negative, they shot Diana at sight and then lost her. Was Siracca lying when she said that the population was afraid of them? Not sure about that.
Chronus, providing wine to Hades xD
Orion, that even if sometimes helpful in battle, was quite a negative character with his behaviour and was helped by Diana too, who in some situations saved him, in others she made him believe in himself and become better, and convinced him to do the right thing going against his father's will.
The First Born always negative from his first appearance.
The Hyena-men, always negative and following their father.
Doctor Cheever negative: following Cassandra's orders, and then dead in a awful way.
Poseidon negative and then neutral.
Hades negative and then neutral. He was uncapable of love and Diana made him start to love himself after all he had done first to Zola and then to her.
Zeus negative: always cheating on his wife and casting the First Born away as a child because he was afraid he could take his throne. He has appeared only in flashbacks.
Apollo negative, manipulative, too sure in his abilities and now dead.
Milan first negative and then positive, even if he was showed in danger and not quite able to take care of himself.
Dyonisus negative, following Apollo's orders, and then taking Zola with himself...maybe neutral now? Not helpful though.
The Minotaur negative, then he showed respect when Diana spared him, and now he has returned with Cassandra but he seemed to recognize Diana. We don't know yet what he will do.
Ares negative at the beginning (he wanted to teach Diana his way and makes her like him), positive in the end because he met and was changed by her.
The High Father I'd consider negative since he wanted to keep Zeke with him.
Zeke: the child who has to be protected and who could be the end of the universe.