It sounds as if you have nothing Against a necessary entity per se and that IMV is why. Some atheists imo think the necessary entity has the smell of God about it and they would be right...
I'm not ruling out the possibility of a necessary entity. I'm just saying that you haven't shown that there must be a necessary entity or that this necessary entity must be a god under the normal definition of a personal god.
But let us look at what our necessary entity entails...
It has always existed
That does not follow.
It exists rather than nothing existing
This is a tautology. If something exists then something exists. Well done. How profound.
There is nothing that can make it do anything...otherwise that would be the necessary entity.
Well that rules out your god as a necessary entity: humans forced your god to incarnate as a human.
Subsequently, it obeys no greater law, has no context in which to make an accidental or chance action.
Again, if true, your god cannot be a necessary entity, otherwise it would just have forgiven humans instead of going through all that death and resurrection nonsense.
Given that then it is not like a natural, unconscious thing.
Huh? That's a leap.