Here is a thought. Trump had already given Afghanistan to the Taliban.
Think about the rapid takeover of EVERY province. This did not happen over night. For years our minimal presence and the steep body count the Afghan forces suffered, it added up. To a token force that did not maintain control over the population. The cities already belonged to the Taliban, in everything but name. That is how you can flip a switch and the so called Afghan government vanishes over night. They had already lost the war. Before Biden became President.
2,500 US forces, not enough to defend themselves or fight the Taliban, were under a ceasefire agreement. The one Trump made when he cut the Afghan government (non existent) out of the peace talks with the Taliban. Trump negotiated with the Taliban because they already ruled Afghanistan.
If Biden is guilty of something, it is being too feeble to read the room and to react accordingly. Too feeble to wield the truth and hammer home the points, to make it simple and to explain it to us. The dice were loaded, The Art of the Deal was in play. Only option(s) Biden had left was a new invasion force of 100,000+ US soldiers, or to cut and run. It was done badly because we were trying to escape with our tail between our legs. From an enemy nation with a paltry force of 2,500. VS an entire nation. Engaging the Taliban in violence without full force would have been catastrophic.
If we had a competent President, he could have sold us the truth. It would have been shocking, horrible even, but he would have at least been straight and honest with us.