Hell, if we held almost ALL of our social programs to that strict requirement of "never move the goalposts" in your terminology, we could EASILY declare every single one a "loss", an abject failure, right now.
Wonder if you'll admit that? I won't hold my breath.
Winning, or even just a respectable end result in Iraq isn't good enough for you and never has been. Your politics and worldview require a U.S. defeat, plain and simple.
And it kills you that it isn't working out that way.