In order to explain the injustices of the early US, one has to comprehend English common law, the economics of empires bound together by wind-powered sailing ships, Protestant and Catholic Christian doctrine, and the legacies of the Spanish Reconquista that became ideological white-supremacism.
It is really easy to come up with caricatures that say “Jefferson was just a rapist” or “the Articles of Confederation were okay, but the Constitution sucked” or “the colonies would have been fine under British rule forever” or “everyone shoulda just joined the Iroquois”.
In fact, everything was worse and more fucked up and lots of people died in misery and horror.