Now ask yourself – If it had been God's plan for Esau to die at the age of 6 weeks, would he have been saved or was he chosen for destruction prior to birth?
IF it had been God's plan for Esau to die at the age of 6 weeks, he would have been saved. However, God chooses no one for premature death, so the premise of your question is flawed, making your conclusion flawed.
It is also logically flawed to assume that because God allocated Esau and his descendants to serve Jacob and his descendants as the tribe through whom messiah would come in 1836 BC, that God's statement made 1400 years later, in 430 BC, rebuking Esau's descendants for seeking the destruction of Jacob during the fourth and fifth centuries BC, was addressed to the baby Esau in the womb of Rachel.
Interpreting God's expression of hatred of the 4th century BC Edom to be an expression of God's hatred for their original progenitor who lived 1400 years earlier. God does not hate someone on the basis that their descendants 1400 years later will do evil things.