No man can choose to reject sin and embrace righteousness until and until God determines to regenerate that man by the free gift of the indwelling Holy Spirit. A man must be born again to know the things of God. And that rebirth is God's call, not men's.
Paul anticipated your objections and answered them in Romans 8 and 9.
Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour?" -- Romans 9:20-21 "Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus?
All man or all God. Calvinism is blind to the third possibility. Can't even see it.
Of course we cannot be saved without God's grace. Paul also said work out your own salvation.
God doesn't create trash or robots. And robots cannot be held accountable for anything.