I believe these criticisms are true of essentially everywhere on earth. How much of Germany was French for a time or a vassal state of this one lord or another? Africa, the continent that invented slavery still enslaves people to this day. The Native Americans themselves faught with one another for land and treasure. Going back far enough, we cro magnons stole neanderthal land.
The United States didn't pop into existence in 1776 bringing with it some sort absolute barbarity that previously never existed, it's the other way around, the world was pretty backward and barbaric until the Americans got around to fixing it.
I personally find the mental model that includes the dynamics of dominance and subjugation along with the responses of solidarity and resistance extremely helpful in understanding the world as a whole. Why are things a certain way etc? Because of X.
It is a physics, and is more completely predictive and reliable than a mental model that sees only oppression and anxiety (as many people are limited to) or one that sees only ambition and advantage (as many peoples' blinders dictate).