Egypt like every nation, was destined to die. In Sheol, all her greatness would be forgotten. There is only one way to escape the curse of death - through Christ the resurrection and the life.
Paul admitted it freely: there were times when he had to change his plans. But he was confident that God's promises, given in the gospel, would never change.
Egypt was a splendid empire - a tree of life, creating a new Eden. But God planned to bring it crashing down. Why? Because of its towering pride.
The "superapostles" congratulated themselves on their achievements. But Paul had something better to rejoice in: a clear conscience. He was sure that his work was in line with the gospel of God's grace.
The Israelites envied the resources of Egypt. But all those resources would soon be stripped away.