No one said God "abandoned" them. The Holy Spirit, who is just 1 person of the Trinity, departed from Saul for a time.
This proves the Holy Spirit did not permanently indwell and seal believers in the OT because they were not regenerated and born again on the spot, because Jesus had not even come to pay for their sins yet.
That is the issue you keep avoiding with your red herrings about "abandonment"; the Holy Spirit departing someone does not mean ALL 3 MEMBERS OF THE TRINITY ABANDONED THAT PERSON FOREVER TO HELL. That is your strawman.