Scripture does indeed say God created evil in Isaiah 45:7. The thing is that you don't understand how He did it.
The definition of "sin" is "missing the mark."
What is the mark "missed"?
The mark or standard is the glory of God.
As to what was the make-up of man in his creation one only need understand what Isaiah said:
There is only ONE God.
There is NONE like Him.
He gives His glory to NO ONE.
Holding to these foundational truths about God the make-up of man in his creation is not hard.
Sinlessness, Holiness, Righteousness, Eternalness, Omniscience, etc., are glories of God. Man possessed none of God's glory and so man was "less" than God or fallen short of the glory of God.
The word for that is "sin."
Man was created missing the mark of the perfect, Holiness, and Sinlessness of God. Therefore, man was created sinful. From this sinfulness (sin nature) man is morally evil. He is not even righteous because all his righteousness is as filthy rags. This too translates to being sinful.
