"OK, so what is wrong with this couple eating the fruit?"
Disobedience, sir, disobedience.
Dictators get all upset about "disobedience"! Loving fathers like you and me, forgive our children for foolish mistakes. Am I better than God? I don't think so, but I know my love towards my son is better than what was displayed in the OT as god love towards Adam, and Abraham towards Isaac. On the other hand Jesus befriended prostitutes instead of condemning them to death for their mistakes.