I don't think Biden is totally to blame here, it's a complete failure of US Policy and each of the four Presidents (Bush, Obama, Trump and Biden) share responsibility. They were naïve to think that they could change a country with a vastly different culture and set of social norms
At the end of the day, as tragic as the scenes are in Afghanistan, I believe that it is the will of the people. The Taliban aren't some fringe group, with a small membership base of outcasts. They are a large, well funded organisation who easily took over a country that had a well trained and equipped army (who capitulated very quickly). That tells me that the Afghan government had nowhere near the commitment, backing and support of the Taliban in Afghanistan. This is a very controversial view, but Ive never really supported the narrative that extremists represented a minority in the Islamic world. The truth is, whilst active extremists themselves are a minority (i.e. Terrorists), they are supported or enabled by the majority. I have nothing against Islam as a religion, I think it has great values and ideals and is no more inherently violent than say Christianity. But it has a significant culture problem amongst its adherents, who insist on sticking to outdated behaviours and norms which are detrimental to their advancement as a people. Hence why the Islamic world is constantly in a state of perpetual violence. However, the people of Afghanistan have spoke and they clearly want a return to Islamic extremism. Im all for people having what they want, just as long as it isn't exported to the Western world.
To add to the above, I believe the US also has a significant culture problem with violence, so Im by no means targeting one group. I just call a spade a spade.