Iago is a misogynist - if not a complete misanthrope. He has no regard for humankind in general and has no respect for women at all.
Iago comments each of the females in the play crudely and negatively. He utilises Desdemona as the tool to bring down both Othello and Cassio, he says-
So will I turn her virtue into pitch,
And out of her own goodness make the net
That shall enmesh them all.
Iago is aware of, but maliciously uses, her innocence to bring about the downfall of the two soldiers and the fair Desdemona.
Bianca is not highly regarded at court and Cassio is also guilty of abusing her. However, Iago using Cassio's words about the hopelessly besotted Bianca to further anger Othello shows how he sees that women are mere toys.
He is crude and distainful of his own wife, Emilia, publicly and privately questioning her virtue and loyalty and labelling her as a scold-
Sir, would she give you so much of her lips
As of her tongue she oft bestows on me,
You would have enough.
It is Emilia who reveals her husband's evil machinations at the end of the play, and he slays her cruelly for it.