What evidence do you have its "mythical"?? You started on that premise.so when did God give man this mythical free will thing. Can you provide scripture that supports this free will thing?
He gave it when He made the First Two people.
Joshua 24:15
"But if it is disagreeable in your sight to serve the Lord, choose for yourselves today whom you will serve: whether the gods which your fathers served, which were beyond the Euphrates River, or the gods of the Amorites in whose land you are living; but as for me and my house, we will serve the Lord.”"
CHOOSE.
No where does it say God is "choosing for them". Why does the Bible say CHOOSE if free will is fake?? Either God wastes words or He lies in your worldview. The Bible debunks both those charges so you MUST conclude that free will is real.
How do YOU AS A PERSON go about yourself, assuming your just some dumb robot who merely follows its programming???? How does YOUR belief about freewill or lack thereof impact your interactions with other people??