I'm sure one reason that so many Greek myths deal with terrifying, powerful women - Medea, Electra, the Erinyes, the Bacchae, - is that at some point in the misty past, women held a power that was terrifying - terrifying not because they were women whom men felt threatened by, but because they wielded that power in terrifying rituals that almost certainly involved human sacrifice.
This would not be a popular platform on which to base a feminist agenda.