Except that it was the fault of Saddam. He could have fixed the systems, it's just he insisted on doing it with dual-use materials and we weren't going to allow that as we knew where the stuff would really go. There are other ways of purifying water that can't be used for chemical weapons.
We blocked the importation of materials to fix their systems which should not have been bombed in the first place.
Sorry, blaming it all on Saddam doesn't work. Killing hundreds of thousands of innocent civillians to supposedly force a dictators hands over a number of years is simply morally wrong. Read Nagy which I pointed you to above. The US knew their actions would lead to mass deaths and did it anyway. Do you understand why we are so hated by so many in the Middle East?
Donald Trump keeps doubling down on torture. Do you see why I can never vote for him or anybody like him?