Your post is at once ignorant and insightful. You are correct that Christ is the answer to Job's question... He is the answer to all of the questions of the Old Testament. Where you are wrong is in assuming that God had to live among us to understand us... He came
to die for us. He didn't come and then discover His Love for us.
If you truly want to understand, I recommend "A Father Who Keeps His Promises" by Dr Scott Hahn. May God bless you.