Dr. No, you've stumbled upon the paradox that is Free Will. We humans have the ability to choose whatever we like (right or wrong). We may chose to do right or we may chose to sin. It's up to us to choose. The fact that we choose wrong sometimes doesn't reflect poorly upon the God that gave us that freewill and expects/instructs us to do Good. It reflects upon our sinful nature.

That's the whole trick of freewill - the ability to disappoint a God who loves us and wants us to choose the moral good.

If we didn't have that free will, we would be no better than puppets on a string. Would a parent be proud of their kid for behaving well if their kid had no choice but to behave?