I don't think Saddam would have still been in power. Iran would have rolled over Iraq without US help. They had, at the outset, superior numbers and superior hardware. US intervention "fixed" that.
We make a lot of bad choices when we decide to intervene in various places. We screwed up with Chile, Cuba, Iraq, Iran, Beirut (the second time, not the first, though in reality the second time might have been necessary because of the first), Korea, Vietnam... I'm not saying we should be isolationist, but I think somewhere along the line, somebody should have stood up and laid the pimp-hand down on a couple of presidents and presidents' advisors.