From a logical standpoint, there is no 'problem of evil.' If there were no God, the very concept of 'evil' would be meaningless. What one 'bag of advanced primordial slime,' does to another 'bag of advanced primordial slime' would be entirely irrelevant.

What Epicurus, or anyone here, has not done, and cannot do, is define 'evil' apart from an absolute standard, or show that God could not have sufficient moral reason for the evil in this world.