First, I disagree with your definition of free will.God did leave creation to itself for one Lord's Day. And that is not a 24 hour period, either. Read Genesis 2. Free will may be a philosophy like Calvinism is just a philosophy. But free will itself is just the ability to choose without coercion. God did create the universe with laws so it can do just that. Those laws may be restrictive, but they allow choices to be made with that free will humanity has to make them, without outside coercion of any type. Of course no one has free will to become God, and make God dissappear from eternity. God does not force one to be a slave to sin or a slave to righteousness. That is a free will choice allowed to humans without coercion. So talk about philosophy and imagine all the things about this point except for the bottom line. When you can prove no one has a choice, but is a programmed robot, then that is outside coercion making you do what your own mind is unable to do.
If one chooses of their own free will to submit to being a slave to righteousness, they are not being coerced into that decision. Once a slave to righteousness, it is not coercion that keeps you a slave, it is still your free will to submit. But giving up rights and submitting, leads to you letting God control your will, and of course it is not free at that point. You cannot be disingenuous in your submission. But there is a huge difference in having a choice, and not ever having one, due to coercion. One is not a slave to sin before birth. One is a sinner, but learning to sin happens just like learning to do what is right. Because until there are laws to willingly or willfully break, one does not sin, even though one is born a sinner. It is the breaking of laws that is the sin.
Second, the Bible very clearly says that humans are either slaves to sin or slaves to righteousness. There is no third option or choice as to which one you are enslaved. You were born enslaved by sin, just as the Hebrews in Egypt were born enslaved by the Egyptians.
The story of the people of Israel being set free from Egyptian slavery and made slaves of Yahweh shows that freedom is a fantasy.
Making choices within a parameter doesn't mean you are free. It only means your slave master hasn't fully chained you to the wall.
When people argue for free will they are really telling God that they demand he take a back seat while they drive the car.