That is so meideval, as well as un-orthodox. In your formula evil is part of God's creation because it happens.
Your humanistic approach to life is showing. Is evil not part of God's creation?
Satan is a created being, and anytime God might want Satan expunged from His creation all God has to do is erase him. Poof! Satan is no more!
Apparently that's not how God wants His creation to exist, neither now nor from the beginning.
That they may know from the rising of the sun, and from the west, that there is none beside me. I am the LORD, and there is none else. I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things. Drop down, ye heavens, from above, and let the skies pour down righteousness: let the earth open, and let them bring forth salvation, and let righteousness spring up together; I the LORD have created it." -- Isaiah 45:5-8"I am the LORD, and there is none else, there is no God beside me: I girded thee, though thou hast not known me:
Rebellion is part of the human condition. It is in our DNA. We are disobedient by nature, and unless God takes us by the throat and removes our heart of stone and replaces it with a heart of flesh, unless God gives us new ears and new eyes, unless God graciously puts His Holy Spirit within us to renew our minds and cleanse our spirit, unless we are born again not by the will of men but by the will and purpose and predestined design of God, we will happily stay in our natural, God-denying state, to our everlasting demise.
But there are some of you that believe not."It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
For Jesus knew from the beginning who they were that believed not, and who should betray him.
And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father." -- John 6:63
Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God." -- John 1:12-13"But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: