You might want to read the book first.
And furthermore,,, i think he screwed up the war. Two examples,,, we spent years driving rear echelon supply covoys down unsecured roads. That was one of the biggest contributors to our deaths,,, secure the damned supply line.
Two,, he turned a blind eye to Iranians supplying the IEDs. The iranians even sent in revolutionary guards to assist Al Sadr,,, and Rumsfeld never made them bleed for it. American soldiers were murdered by an enemy that their secdef refused to drop a bomb on.