All of God's way are judgment, that is Good, He is Just, that is Good.
God is Omniscient. God is Good. God is Just.
Nothing about this changes. Maybe you think He isn't fair? LOL
It is often the case that those who accuse others of doing certain things are actually themselves most guilty of it.
Such is the case with you here. You accuse Calvinists of dancing, and you dance like someone is firing bullets at your feet here.
Answer the question, do you think God is good to Satan. Do you think God is good to the demons that were once angels that fell from grace?
In other words did God, based on what you call his omni-benevolence, have to offer a way of life to them?