‘Satan can’t move without God’s approval.’
which makes God, having the power to undo the evil and being disinclined to do so in order to prove a point, the less righteous of the two on balance...
“To show that Yahweh is upright; He is my rock, and there is no unrighteousness in Him.” (Psalm 92:15)
The world is evil because of the freewill God has given to humans. All sin will be answered by God in His own timing.
You should grateful that God is willing to tolerate evil for a time. If He were not so willing, you wouldn't be here. Neither would I, as far as that goes.
You should be concerned that the time is coming when God will "undo the evil," as you put it. It doesn't sound as if you're at all prepared for what that entails.
Seek Christ.
It could have been a test of faith. If so, billions failed it. It could be judgement for sins. It could be punishment for taking something that involved aborted fetal cells.