It was the only way to get a Constitution.
Article VII of the constitution says “Ratification of the Conventions of nine States, shall be sufficient for the Establishment of this Constitution . . .”
Even if GA, VA, NC, and SC refused to ratify (as implied in your post 137), the other 9 states could have had a constitution - and WITHOUT slavery. I mean, if that is what they wanted.
I'm not following your claim “it was the only way to get a constitution.”
You mean it was created under the false pretense that the compromise achieved in writing it would be subsequently enforced. In other words, a "bait and switch."
If it wasn't kept in good faith by the North, why should the South be expected to remain under it?