The fact that a situation may be very complex does not alter anything. If situation S occurs, no matter how complex this situation S may be, then person A will choose action a and person B will choose action b.
The choice we will make depends on who we are (which is completely under God’s control since He apparently created us) and the situation we find ourselves in (which is not under our complete control, but ,again, if God is the way Chrsitians claim he is, it’s under His complete control).
While I think I understand your premise I also think it has a couple of potential failure points.
NOTE: the following contains “Analogies”. Analogies are almost never “perfect”…so don’t expect them to be…
“Maker/Ownership/control”
Here the assumption is that because God made us we are completely under his control…
This may or may not be so…If God did, as we believe, create us with a free will, then the thing built into us is, by design, outside of His control.
This happens all the time in computer gaming design. “Randomizers” are built in by the designer/creator, and when the game is activated the creator effectively releases control of the outcome and consequences. So in a rudimentary sense, the creator of the game has given the game “free will”.
So your idea that because God created us we must be under his control is not necessarily true.
Viewpoint.
Free Will could depend on the viewpoint one takes.
Some take their children to a large playground for the first time. The parents have been there before and even helped design it. They know what is there, the potential dangers, the probable choices of their kids, etc…They might even know that there is likely to be a fight or three among the kids…
The Kids, having never been there before have no idea what to expect, who they will run into etc…
The parents trun the kids loose in the palyground and sit on the side just watching and talking among themselves.
There are two different perspectives here. The parents, because of their greater knowledge and experience can pretty well guess what their own child will do…this is “foreknowledge”
The Kids have very different perspective. They don’t know what’s there, it’s all new, decisions must be made, actions taken, interactions to deal with and so on…Because of their lesser knowledge, and experience, they have far less idea what to expect.
So the idea the God knows what we will do and that means no free will fails because WE don’t know what we will do…Free Will exixts fro our viewpoint (the only one we have)
Peace
James