Epicurus makes the argument of a juvenile delinquent who comes from a good family and has godly parents, and yet blames them for his own wicked behavior.
The argument is fallacious because it would have Man redefined as a being without freewill. He sounds like Ted Kennedy talking about the evils of the abuse of women: he's against it, but only in theory.
Man is by definition a free moral agent, having the ability to choose good or evil. If God eliminated Man's ability to freely choose evil then we would not be Man at all.
If God's goodness is, ultimately, love;
and if one of the things love does is affirm the nature of the other;
and if the other is a human being who is free;
then
because of his love God will so respect human freedom that he will allow us to commit evil rather than destroy us or turn us into robots.
A better way to express the problem of evil is given by St. Thomas Aquinas:
"It seems that God does not exist; because if one of two contraries be infinite, the other would be altogether destroyed. But the word "God" means that He is infinite goodness. If, therefore, God existed, there would be no evil discoverable; but there is evil in the world. Therefore God does not exist."
(
SUMMA THEOLOGICA: The existence of God (Prima Pars, Q. 2))
His reply is
"As Augustine says (Enchiridion xi): "Since God is the highest good, He would not allow any evil to exist in His works, unless His omnipotence and goodness were such as to bring good even out of evil." This is part of the infinite goodness of God, that He should allow evil to exist, and out of it produce good."
In essence, Epicurus says "God must not exist because he lets me misbehave." It's nonsense.