Bianca - She is looked down upon because she is a whore. Cassio is only using her for his sexual needs. She is thinking of getting married to him but he laughs at that idea because it would be lowering his reputation marrying her and says he is only using her for his needs.
Iago - Iago is disrespectful to women and thinks they're just used for your own selfish needs. Even his own wife he uses for his own needs. He disrespects her and doesn't care for her. He includes his wife in his plan by telling her to steal her handkerchief but doesn't tell her why he needs it.
Desdemona - she was taken advantage of by Iago and Othello. Iago used her as a pawn in his plans. He makes her seem as a cheater. The whole was planned on her and if she wasn't as innocent and gullible his plan wouldn't had worked
Brabantio - He's racist and sexist. He does warn Othello about Desdemona cheating on him because she deceived her father as well. Brabantio thinks women never change because if they deceived you once, she'll do it again because it's in their nature.