The US would have needed to stay there for 50-100 years to bring about real change.
Given that we knew that was not a remote possibility when they started, all the lives lost and $trillions spent were just pissed away on nothing.
They achieved absolutely nothing whatsoever and the withdrawal has been a complete debacle.
Sorry Uncle Sam, they saw you coming, they knew you had a short attention span and would lose the will to stay the course and they beat you. We could see it coming a country mile off.