You don't mention what, exactly, you'd like to amend, but it's not like you have any serious proposals anyways, so we'll let that slide. The fact is simple:
Our Constitution is a brilliant document and the only thing that's still sane and sensible, these many years later.
Take your pick: Repeal of the 16th amendment, elimination of the clause that gives Congress the authority to suspend
habeas corpus, an amendment that ensures that personhood only applies to
individual human beings, elimination of the clause that gives Congress the authority over the US Armed Forces,
et cetera.
And no, you can't be serious when talking about the US Constitution: It was written by people who believed only rich landowners should vote, that expanding the colonies to the west was a must (expansion to the west = Native American genocide,) that slavery was good because blacks were an inferior species,
et cetera.
That these rich cocksuckers created a modern constitution has more to do with convenience that anything else: The newly empowered rich landowners knew that a well-armed local civilian population, tired of the queen of England, would have ZERO tolerance for anything that remotely resembled authoritative government (aka civil war). This is the only reason why they created such an advanced constitution for its time, not because they believed what they were saying (it's well known most did not,) but because they wanted to send the message to the "undecided" (40% were patriots, 20% loyalists and the rest, 40%, were people who went about their daily business not given a single fuck about who was going to get to collect taxes) that the center of power laid in the state government, not some queen 4000 miles away.
And once the Brits were gone the federal government wasted no time in absorbing as much power back from the state governments as they could. Which is why we nowadays have state governments devoid of any real function but garbage collection, driver license issuing and other state-worthy endeavors.
Albania enjoys more independence than any of the states in the US.