Based on what do you say this?
Instead, the war was sold as quick
No it wasn't.
our military welcomed as liberators,
I'll have you know that our military were, and are, welcomed as liberators, by some Iraqis. All Iraqis? No. But so what? Since when is that the standard for anything? If some fraction of Iraqis doesn't welcome the overthrow of Saddam, that makes "Iraqis didn't welcome us" a true statement?
Anyhow, "our military will be welcomed as liberators" was not a prominent part of how the war was "sold" (geez how I hate this cliched way of talking that the left has given us) in the first place. You can't find Bush saying this in a speech for example.
and the war was to virtually pay for itself with oil revenues.
No it wasn't. Again, show me where Bush ever said this.
If the war is now perceived as a failure, its because reality hasn't matched administration pre-war PR.
No, it's because reality doesn't match the cartoonishly impossible fantasyland ahistorical standard for success in war which has set up by a hostile media and straw-man-building left.
All of your preceding points are complete bogus straw-men. Bush never said "quick", he never said "pay for itself", he never said "all Iraqis will welcome us as liberators". Whether you know it or not those memes are straw-men that have trickled down to you from the left. The war is perceived as failure by people who have lazily bought into the left's straw-men.
Did I say Bush?
Trickled down from the left?
Ken Adelman said "I believe that demolishing Hussein's military power and liberating Iraq would be a cakewalk. . This President Bush does not need to amass rinky-dink nations as 'coalition partners' to convince the Washington establishment that we're right."
Cheney said, “I really do believe that we will be greeted as liberators."
Ahmed Chalabi said, “American troops will be greeted with flowers and candy”
Stephen Moore, president of the Club for Growth wrote, "In the run-up to the war in Iraq, administration officials had consistently argued that Iraq's oil revenues would pay for the costs of reconstruction."
Richard Perle predicted that support for Saddam would "collapse after the first whiff of gunpowder."
Donald Rumsfeld said "It is unknowable how long that conflict will last. It could last six days, six weeks. I doubt six months."
Paul Wolfowitz said, "The Iraqi people understand what this crisis is about. Like the people of France in the 1940s, they view us as their hoped-for liberator."
Cheney said "I think things have gotten so bad inside Iraq, from the standpoint of the Iraqi people, my belief is we will, in fact, be greeted as liberators. . . . I think it will go relatively quickly, . . . (in) weeks rather than months."
Some Afghanis welcomed the Soviets too. We know how that turned out.