I consider it more like criticizing the roofers for building the roof out of porous and water-soluble materials.

I sympathize with the an-cap position, but that's not why I criticize the Constitution specifically. The reason I criticize the Constitution specifically is because, from a minarchist point of view, a constitution could have MUCH stronger and more enforceable checks and balances than our current Constitution does. Also, it could easily do without a few of its dangerous and easily misconstrued phrases.
The Constitution worked fine until 1913, when it was changed fundamentally by the States. In 1912, the share of federal GNP was only 1.75%. It had remained at around 2% or less for about 125 years in peacetime and at 4% in wartime, excepting Lincoln, who jacked it up to a still fairly moderate 10% for a few years.
In fact, the central government in 1912 was smaller than it was when the Articles of Confederation were ratified.
History shows that you can't pull the central government below 1% of GNP, without putting people's life, liberty and property in danger. The smallest budget in the US since the AoC was in 1811, when frugal James Madison presided over a budget of 1.23% of the GNP.
So if you think the Constitution failed, then you think everything in world history has failed, which isn't a very enlightening position.
Just to make things clear, a 2% federal budget today would mean $300 billion for all federal expenditures per year.
At 4%, the ideal wartime spending level, we have only $600 billion. And that's for real wars, not the Middle East BS.
Even Lincoln, at the height of the Civil War would only be spending $1.5 billion per year, less than half what Obama is spending now.
Basically, you're a troll, trying to stir up trouble.