. I believe reality is fundamentally physical. By that, I mean that no matter what is created, no matter what exists, everything that exists must ultimately possess physical properties, have a form of materiality that will interact within the limits of this universe or another. If something has no physical properties (as in physical interactions of matter or forces) it cannot influence reality and cannot be perceived or change anything.
You are fundamentally wrong here. The laws of physics follow a mathematical pattern. Everything in nature follows a strict set of rules, at least at the Newtonian level of physics. This implies nature is governed by things that are intangible. Ideas are not tangible and yet very real. So, there is a non-physical aspect about reality that isn't physical/tangible at all, and it dictates how the physical world behaves.
To me, this implies the existence of a Creator. Since reason and logic precede the physical reality itself, there must be an intelligence behind it. How can order come out of chaos? How can anything come out of nothing? Look up Thomas Aquinas's teleological argument if you want to know more about this.
I mean no disrespect, but I think this idea that God can be opposed by a human is extremely comical and absurd. I have had intrusive thoughts about God, but I know resenting God will only bring forth my destruction. You, a finite and limited intelligence, cannot compete with something infinite and perfect like a god.
About the free will question: if the environment determines every human action, how come there are people that overcome their environments? Neuroscience says the environment SHAPES our behavior (pay attention to this word, "shape"). This means our behavior is MODULATED by the environment, meaning the environment exerts constant influence on us, but it does not DETERMINE our actions.
It is because we are sentient, conscious, and aware beings that we can overcome the external influences by purposefully acting on them. We are not as free as we would like to believe, but if you are conscious about your intrinsic nature and external influences of the environment, you can act upon it and become the master of your behavior. WE CAN CREATE OUR OWN ENVIRONMENTS.
Example: Brazilian media only talks about corruption, crimes, and negative events. Consuming national media was making me depressed and sick. What did I do? I turned off the TV forever. I don't consume that shit. Haven't watched TV in years. I chose not to be bothered by things that are out of my control. I changed my environment.
This is why culture, religion, morals and ethics, and so on are so important. If we don't impose rules on how we carry ourselves through life, we devolve into something more primitive. We are not born civilized. We are educated to be civilized. This is why modernism is so dangerous. It is eroding old traditions that make a civilized life possible.
The natural consequence of deterministic philosophy is disregarding human agency and not holding anyone accountable for their actions, which is a very irresponsible, dangerous, and evil way to go about life. It's philosophy for irresponsible brats. Yes, some people can't answer for the actions, but if you are lucid, you should be held accountable for your choices. We make choices literally every moment of our lives. If we make enough bad choices, life becomes harder. If enough individuals do that, society collapses.
My final advice: study about the paranormal and let your mind be flooded by doubt. I had similar thinking to yours in the past regarding free will. Your beliefs are called "determinism" in philosophy. I don't care if you believe me; I have witnessed paranormal shit. I know we are not gone when the body dies. I ask you to do research on this. There are things out there that we don't know about or can't explain. You will encounter a lot of anecdotal stuff, but don't disregard those simply because they aren't scientific. Science can NOT understand things that operate beyond the physical.
I didn't snap out of determinism by having a eureka moment. I read more about philosophy and challenged my views on the supernatural with both research and hands-on experiences.