Well, if not about the relationship between man and God, what is it? It is a record of sin and redemption.God creates man in his own image. Man strays and soils that image, and suffers. God leave the Garden, gos into the desert to fetch him and pays the supreme price,cleansing man with blood and water.
Evidently you cannot find a single place where the Bible "over and over and over" claims to be about "the relationship between man and G-d."
You have not the slightest idea of what the Torah is and never will.