It is often thought that God’s first commandment to Adam was the prohibition regarding the Tree of Knowledge. This would mean that man’s first encounter with the will of God was a negative experience: a restriction. However, this isn’t actually true: This was not the first commandment! Careful analysis of the text shows that the first commandment to Adam and Chava was to eat from all the other trees and enjoy them.
How can we understand the self-delusion of the Jews who complained against Moshe for taking them out of Egypt? Obviously, the Israelites were well aware that their life in Egypt was not one of tranquility while sitting by pots of meat! I would suggest that they did not intend to deny the past, but that they wanted to deny the future. Not that it did not happen, but that it would not happen again!