the ratification of the constitution was not the moment these independent states joined together, they had already done that years before by ratifying the Articles of Confederation.
history is written by those who ultimately succeed. So we ignore the articles.
We’d be ignoring the Declaration too if GB had put down the insurrection in their colonies. Our true independence came when GB lost the will to continue the fight with their superior resources, perhaps Yorktown is the closest thing to the actuak moment we achieved independence.
We did ignore the Declaration when the Northern states launched an invasion into the South to conquer those state rather than let them have independence.
The Declaration lists "Independence" as a right given by God, so we not only ignored it, but deliberately violated it.