God of OT wasn't mean. God is sovereign and it's HIS way not ours. He created us, so we comply with his construct. The OT is full of our non-compliance, and God's righteous judgement of it.
All Sin originates with Satan. The very first sin was caused by his speaking 46 words. That 46 is extremely important in understanding the REST of sin…there are 46 chromosomes (23 pairs..think about Q and NXVIM cult and founders wife having 23 and me company…)
We were instructed to mate for life with one of the opposite sex and not dilute the purity of that cleaving as one.
Fornication and adultery are defilements of that purity.
I, too, am a sinner and guilty of that defilement.
The OT (the old contract with God) is no longer in force due to the death of the Testator (Jesus Christ's death).
Now we get to the New Testament. The NT requires compliance in the form of submission (belief).
That submission and belief brings us a Comforter, a guide, who will show us "great and mighty things" in the Word of God, giving the understanding you (and I and many others!) seek.
You are pretty close with your "AI is Satan" statement. I believe that AI will be what enables the Image of The Beast, not just the Mark.
Keep in mind that Jesus himself told his disciples that in the time of the end it would be like in the days of Noah.
You can tell how it was at that time by one verse in the bible:
Genesis 6: 5 "And GOD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually."
The fallen angels had been mating with the daughters of men. I also believe that there was genetic manipulation going on at that time (think of legends of Centaurs and the Raven-headed Gods of Egypt, they were seen of men and drawn, not myths as atheist scientists would have you believe).
Joshua 8:29 And the king of Ai he hanged on a tree until eventide: and as soon as the sun was down, Joshua commanded that they should take his carcase down from the tree, and cast it at the entering of the gate of the city, and raise thereon a great heap of stones, that remaineth unto this day.