Yeah, we did win the war. Saddam Hussein's regime is no longer in power in Iraq. The aftermath of the war is much more murky, and we may have lost significant ground there, you can debate that until you're blue in the face, but at least Saddam isn't around to make his argument.
Now, my personal opinion is that even with all that went wrong in Iraq, it's a better situation there for now than it ever was before we went in there. I mean, they had something that superficially resembles free elections, and the various tribes and factions that make up Iraq actually have been forced to talk to each other instead of going right to the shooting-people part! Little things like that that we take for granted in civilized countries and the Iraqis have to be taught how to do because they've never had that experience. In the end, even without that, Saddam killed more Iraqis than the internecine violence in the country is ever likely to.
But ultimately? That's just MHO. Others will probably disagree, and that's their right.
Oh, and for the record? While they didn't find them in the quantity and readiness that they expected before the war, the coalition troops did unearth a number of Saddam's WMD's, both in Iraq and a few in the neighboring countries he shipped them to in the days leading up to the war (mostly Syria). The media likes to ignore this fact or downplay it -- but the fact that there were even a few WMD's -- heck, the fact that they ejected the inspectors whether there were WMD's or not -- would have been grounds for invasion under the terms of the treaty. You can not like war, heck, I don't like war, probably only a handful of people who don't really know what war is actually like it, but this particuar war was no more unjust than all war is unjust by nature.