Were 3/4 of the colonies in the British Empire on the side of the 13?
Remember, that was a time when the sun never set on the British Empire. We know King George did not agree.
No matter how you slice it, you cannot deny Southern Independence while maintaining the legality of the American Revolution. You can merely say, “might makes right”, and “the victor gets to write the history books”. ;)
I wasn't aware there was a provision for colonies amending the British constitution. That could have saved us a great deal of trouble in 1776 and onward.
I'm sorry to say "might makes right" is a staple of human history. Nations will always employ it. The questions are how much might? and for what purposes? One has to be careful not to throw the baby out with the bath when cleaning up the house.