He asked that the cup would pass from only if it was God's will. He also ended his prayer by asking that God's will, not his, be done.
He asked that Gods will be done. And Psalm 91 suggests that it was Gods will that the cup would pass.
When he as arrested he refused to allow angels to rescue him because to do so would be to God against his fathers will.
Do you think that I cannot appeal to my Father, and he will at once send me more than twelve legions of angels? But how then should the Scriptures be fulfilled, that it must be so?”
-Matthew 26:53-54 ESV
Jesus did not call on His father to send the legions of angels to rescue him. because Jesus had fully submitted to the will of God. If it was Gods will for him to be rescued, then God would have done so.
These sacrifices didn't actually take away sins. They were prophecies of what Jesus would do.
The sacrifices were not a prophecy of anything... they were just a part of the Israelites religious practice.
However, Christian theologians fabricate a connection between Jesus sin sacrifice and the Old testament sacrifices of the "unblemished animal". Jesus is seen as the perfect sacrifice.... despite the fact that the bible does NOT condone human sacrifice.