First you said a being who knows the future, not that he has full control over how we are made. God is not all - controlling as such. That is not to say by way of divine intervention nothing happens as a result of such, but not all things. Surely foreknowledge does not give way to causation as there is no causal relation, only a correlation.
So you're saying God did not make you?
I think you're making the mistake in restricting the nature of our choices. Sure we can say that they are linked to how our brains are 'wired,' but that is not all "choice" is. Choice has to do with our desires and reasons for acting, too.
Desires and reasoning are actions carried out by the brain, this doesn't address my argument at all. In fact it's a point in favour of it.
Moral responsibility is connected to our mental capacity for comprehending our reasons for acting and any consequences. Since moral responsibility and free will are connected, free will can be defined in that mental ability sense. That is but just one type of freedom. The other is the ability to act how we desire without any force or prevention from any external or internal force. We choose what to do based on our desires, and we understand those desires and the consequences of our choice. We physically make said choice transpire, a type of agent causation. We are held accountable for what we cause. That is free will.
Again, you're linking this all to mental capacity. If God created your brain, then your mental capacity and decision making is a direct result of his design. The decisions your brain will reach are a result of it being made that way.
God has not 'set' all of that up. I would say He has with some things, but not all. Nor does God control our brain in any way that allows for what we do. What God foreknows of is our desires, and what He foreknows does not cause what happens. Free will in the sense above does not conflict with a Deity that knows the future.
Knowing the future in itself doesn't contradict freewill.. however knowing the future, and being responsible for how you are designed does contradict freewill.
For example, say you designed an android, or some other intelligent being. How you program it's brain will determine what decisions it makes. Now pretend you had knowledge of the future, and you programmed your android in a way that you knew there would be a glitch that would lead it to go on a mass shooting rampage 25 years down the road.
If you do not repair that glitch, is that the android's responsibility for the mass shooting, or is it your responsibility? I would argue it's your responsibility. Saying free will coexists with omniscience and creation would argue it's the androids fault. My point is, it's not the androids fault, because it was incapable of choosing any other way than how it was built.
Our brains work essentially the same way, decisions are made in the subconscious. Neurologists have proven that your brain determines what choices and decisions you make before you are consciously aware of them being made. That comes down to your brain structure, you aren't going to choose anything other than you ultimately choose, even being aware of the alternatives. That's just how the brain works at the subconscious level.