Gnostic cosmology is a way to illustrate things
It should not be taken literally
There is no lesser or more pwoerful or less powerful
All things are the pleroma
What we have here is essentially the Gnostic cosmological "battle"
the battle to gain Gnosis. The Demi urge thus then becomes the ego, the spoilt, confused and selfish part of God.
Archonic forces prevent us returing to our true states, one's of divine beings who have Gnosis, who are not trapped in a realm created by the ego (demi urge)
essentially what the Gnostics are saying is that:
the christian and Jewish standard (as there are many versions) view (mainly christian here)of the creation and eden story can be seen a different way.
Now while some Gnostic groups openly stated that the mainstream were fools (particularly sethians, who for example saw the 12 apostles as fools and possibly the archons, archons: rulers, beings that were created by the ego or demi urge to control mankind, think cosmic personifications of greed, anger lust etc etc etc) others did not act in such a harsh way. For example Valentinus was nearly Pope...he could have hardly been a cnadidate if he so openly rejected edenic cosmologies....
Now this different way...
Essentially we are looking at what has become known as a mystical view... the demi urge and the gnostic cosmological view of the eden story is one where mankind becomes seperated from the divine. Here they are seperated from God. Here they are ruled over by a false being who proclaims they are god. Thus the ego, the ego is the false sense of self that says "I am god, I am thr controller, I am in charge" when this is temporary and false.
So the Gnostic story is telling us that Christ and Sophia come before adam and eve, in the form of the serpent. Here they discuss with adam and eve, and reveal that they are under the control of God's ego (the Demi urge)..and to run away from falseness. So man falls...falls from eden, in a quest to regain their true natures, the natures before being under control of the demi urge. A fall in order to gain Gnosis.
Now Gnosis can be related in many ways, a simple way to think of it is, divine contact, experiental knowledge of the divine. Now mysticism has been defined as experince of the divine (Thomas Aquinas). The Gospel of Philip (and other Gnostic texts) allude and make it clear that, Gnosis however goes further. In order to have knowledge or Gnosis one must BECOME that which you are seeking to know.
Thus in order for adam and eve (all mankind) to regain Gnosis, regain knowledge, (Know thyself) they must BECOME that which they seek to gain knowledge of....or God. The Gnostic God (not the demi urge) is the God above God, the unknowable ineffable God. This is the Tao, the way that cannot be spoken of... this is the uneding light of the kabbalists (Ain sof) and this is the Sun symbolised many handed being known to the Egyptians as the Aten.
So really worrying from a Gnostic stance whther the God in the creation/eden story is garbage, wrong etc. is silly....
Gnosticism knows, the map is not the territory.....
leave behind those that need to worry about literalism and history and materialism.
Go beyond such things....and seek Gnosis.
..........................
Let me be worthy of thy bride-chambers that are full of Light.
Jesus Christ, receive me into thy bride-chambers,
thou my Saviour. The body of death which. . . . . .
I have killed it, I have made it keep far from my members . . . . . .
indeed put me to shame. I am a maiden unspotted and holy.
Let me see thy image , my holy Father, which I saw
before the world was created, before the Darkness
presumed to stir up envy against thy Aeons.
Because of it I became a stranger to my kingdom,
I severed its root, I went up victoriously on high.
Purify me, my bridegroom, o Saviour, with thy waters
. . . . . . that are full of grace.
--Manichaean Psalm