Which is why we're sending troops back to create a more organized and humane exit. So just based on this reversal, it could have "gone differently".
My first thought is succession planning, tiered transition based not on a timetable but on achievement of goals. The cut and run strategy is always available, but shouldn't be the first choice in most cases.
Obviously I am not a foreign policy or military expert nor is it an area of competency I claim , but I think it's fair to question the expertise and competency of these experts given the results.
You seem to be arguing it couldn't have gone better (everyone is surprised) while there's a near consensus that it could not have gone worse.