Souls are completely compatible with determinism, but not with the deterministic nature in the reactive properties of material based entities over which there can be no control - just inevitable uncontrolled reaction. The question is in what determines your conscious will. In your scenario, there can be no entity within you which can exert conscious control or choice - all is just inevitable reaction. You seem to be unable to grasp the concept of your thoughts being deliberately directed by conscious willpower. The entity within you which exerts control is not random, neither is it uncontrollable reaction. It is not shackled by the uncontrollable nature of physical cause and effect, but driven by the spiritual interaction of the human soul - which is you. We all have the freedom to choose our own destiny.