No, it isn’t. The Articles of Confederation are what we had first before deciding it had too many flaws and ditching it for the new constitution in 1789. (Note: this is 6 years after the Revolutionary War ended, and 14 years after it started.)

There’s no reason we can’t or shouldn’t do the same again now. The original writers clearly weren’t shy about pointing out the flaws, and anyone else defending the current constitution as if it shouldn’t be torn to shreds is not following what the founders wanted for us.