The Demiurge is evil in the gnostic world as gnostics believe this creator is evil who was given this right to create by the ultimate Creator. It is assumed Sophia created the evil Demiurge; I didn't say it was true, but that it can't be true, since God does not create evil.

The uncreated Creator is the only one who can create sentient beings. And man who is created is not evil. Moreover, the ethereal beings you cite are unsubstantiated, but Jesus walked the earth.

Things are very specific in God's design, which you call black and white while you live in greyness and vagaries. They say the devil is in the details, but he is also in vagaries and lack of clarity. That is when his deceptions arise.