The problem with Maliki is that we put all our "eggs" in him. He was the symbol of the new "democratic Iraq" we created so forcibly deposing him was not too appealing. Bush was in a rush to get a Govt. going and the CIA seemed to think he was the only choice at the time. Our bad but not Obama's fault at all.
Your problem is that all roads must lead to Obama's failure so you refuse to even entertain the thought that Bush left him a time bomb waiting to explode.