If we knew the country would fall in 72 hours and didn't leave measures in place to at the very least extract Americans and those that put their lives on the line to assist us, then it's even worse.No one dropped the ball. We knew exactly what would happen.
Can't stay there forever. Afghanis need to take charge of their own country.
The only issue I have is that we should have waited until fighting season ended to withdraw. It would have bought more time for the ANDF.
We should have left after OBL was killed if not before then. It was clear well before that moment that the country couldn't be governed or democracy inserted.
That said, the optics for this are really bad for us regardless of which opinion you hold around staying in country or leaving.