We have been in the middle as far as food chain for the vast majority of our history.
We used to eat after the scavengers Hyenas leave, whatever is left, and the bone marrow.
If we found a fig tree, we would eat as much as we can before the baboons came.
We just got to the top of the food chain recently. We still act like we are in the middle, by binging on sweets and high carbs whenever we can.