I don't think we created Saddam Hussein but I do know that we aided him in his war against Iran. If he was thus our creation, then we are responsible in some wise for his depredations and we have attempted to make amends by removing him from power.
There is not much more that we can do at this time.
As far as our having no business in the Middle East, we must at all times look to our national security. A US presence in the Middle East is essential for strategic as well as economic reasons and anyone who thinks differently needs to study global politics.
As far as "Now we despise and demonize the fruits of our labors in arms sales and poor judgement.", goes, the things that Saddam Hussein has done to his own people is worthy of our despite and he has done a better job of demonizing himself than we ever could.

troll