I recommend that you consider:
necessity
objectivity
necessity
I recommend that you consider:
the correspondence of truth
I recommend that you consider the first-principles of logic.
It was during my studies of such as these that I began to understand that God is necessary and all else is contingent, and that objectivity does not exist, chance does not exist and that God gets everything He wants constantly, whether he likes it or not.
I was where you are, not all that long ago.
I will tell you this. The course of sanctification flows from a subjective view of God to a sovereign view. It's a life long process.
I spent 20yrs believing myself to be objective, such is as offensive as believing oneself to be sovereign. Error is error. We are subject and God is sovereign and no one is objective, That was 11yrs ago.
Today I understand that I am contingent, subject and I can only hold a subjective perspective.
The revelation of God's sovereignty is a "Matrix" moment.
As for God's good purpose for the horror of sin, remember;
We are not yet born, as a people.
We will be a people redeemed from the horror of sin by the blood of Christ.
All of this, from Adam to the bride of Christ, is just our bloody birth.
We will START as a people who will never forget the horror of sin or the hero of Christ.
This is the knowledge of the greatest evil and the greatest good.
Goes is love, He is also: wrath, judgment, mercy and patience.
Any attribute God has He has without limit,
so whatever He has, He is.
God's holiness is the inviolate balance of His infinite perfections.
It is everything about Him.
Anything less than everything would violate His holiness.
Without sin and redemption from sin and damnation from sin,
how would God have displayed His holiness?
It all makes sense to me.
Once you get past the unfairness and the shock that we are utterly subject and yet utterly accountable, you will too.