When the patriots decided consciously to abolish slavery, when the patriots consciously decided to write the laws and put them on the governor’s desks, and when the king(parliament, etc) consciously decided to veto the laws and prevent them from becoming colonial law, in that singular moment everything changed. What you are saying is completely false.
No, not saying that the patriots didn’t do those things. What I am saying is that other “patriots” were buying slaves as fast as they could be brought in from Africa. When the last red coated soldier left the 13 colonies, the colonies became able to abolish slavery. they chose not to do so. When they drafted the Articles of Confederation, they chose not to end slavery. When they drafted the Constitution of the United States, they chose not to end slavery. From the day the last of the King’s soldiers left the 13 colonies, we, and we alone are responsible for the existence of slavery in what would become the United States of America.