While "free will" is a concept that has been made available to humankind because of the goodness of God, there also exists a concept of divine will. According to divine will, God is in control and knows everything that has happened in the past, is happening in the present and will happen in the future. As such, He also knows the actions that individuals are going to take, knowing beforehand if someone will commit a sin. Following this thread, wouldn’t it be safe to assume that God indirectly wanted the evil act to be committed? If evil brings suffering, then how can God be all-goodness when He allows His creation to suffer, especially when He has the power to prevent it? God is not omnibenevolent as religious texts believe Him to be.
If God already knows what is going to happen and what evil acts people are going to commit, then what power does He have over evil? Can He choose to stop it, or is it out of his hands? If he can and chooses not to, He is not all-good. If He has no power to, then this points to God not existing as an all-powerful being.
Theodicies do not answer any of these questions, and do not explain why God allows evil to exist.