Are you able to flesh all that out from scripture?
He courageously never lost sight of His mission and was thinking of others to the end.
Instead of reading your humanistic interpretation into it, show from scripture "that Jesus asked if God would let pass from Him was the pain and agony" of the cross.
I include the death, the crucifixion, along with the agony.
You emphasize and isolate just the death, because you claim unbiblically that Jesus feared non-existence after He died.
You cannot show from scripture that Jesus was dreading that He would not exist after death… since Jesus repeatedly said He would be executed, then rise from the dead in 3 days.
Cup = wrath of God. This wrath fell upon Jesus, when He was crucified, and that wrath caused pain, humiliation, agony, temporary separation from God, and death.
For in the hand of the Lord there is a cup with foaming wine, well mixed, and he pours out from it, and all the wicked of the earth shall drain it down to the dregs.
Thus says your Lord, the Lord, your God who pleads the cause of his people: “Behold, I have taken from your hand the cup of staggering; the bowl of my wrath you shall drink no more;
Wake yourself, wake yourself, stand up, O Jerusalem, you who have drunk from the hand of the Lord the cup of his wrath, who have drunk to the dregs the bowl, the cup of staggering.
So Jesus said to Peter, “Put your sword into its sheath; shall I not drink the cup that the Father has given me?”
Thus the Lord, the God of Israel, said to me: “Take from my hand this cup of the wine of wrath, and make all the nations to whom I send you drink it.
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Luke 22 states that Jesus asked God to take the cup from Him. Cup symbolizes the wrath of God, put upon Jesus who bore the sins of the world. So Jesus prayed again, and experienced anguish. Not anguish about not existing.
41He withdrew about a stone’s throw beyond them, knelt down and prayed,
42“Father, if you are willing, take this cup from me; yet not my will, but yours be done.”
43An angel from heaven appeared to him and strengthened him.
44And being in anguish, he prayed more earnestly, and his sweat was like drops of blood falling to the ground.