OT:
Because he hates them, and wants to see them suffer and fail?
Seriously, if you're a God who has RULES, and then, you give humans impulses that run COUNTER to those rules, and THEN, you say, "You have the power to choose, but if you choose wrongly, you're DOOMED!"? You must really WANT humans to fail.
I tend to be agnostic bordering on atheist, but when I do consider God's existence to be possible, that's WHY I believe in God, because it really does fit with how fucked up the world is. As cliche as it is, we're fucking Kratos in God of War.