It's not Fordola as a character that is bad, it's that the evil women get to live and be redeemed possibly, while the evil men all die. Grynewaht lost his humanity and was turned into something awful at the hands of another, and even he paled a bit at Yotsuyu's savagery. Nidhogg as a villain was a lot more tragic than either, considering how fresh the betrayal was in his mind due to his long lifespan, and we forget even the good dragons originally turned a blind eye to him. Even Thordan had much more of a rationale for what he did at first. They pretty much all died with no real redemption. Even the shield guy at the level 49 trial seems to have died (I think he is in POTD).

I mean, the evil women that I do know died only did so because they were literally faceless, like Junia and the female ascian. Or they are eikons/primals. The good women die a lot more, and suffer more equally.