I can see why the Arms were left behind maybe, to help the Taliban defend themselves against Chinese aggression.
This smells like part of the "plan", and Biden was forced to go along with it.
[They] are big mad that arms were left behind, that means the Taliban has the means to defend themselves from CCP Chink Aggression if they decide to turn down China.
Unsure what part/side the media is playing cause of the fog of war, however.