Some tin foil hattery to lighten the mood:
The Afghan debacle is the western world teaching America/Dems/whomever involved, a lesson about rigging elections. Trump was laughed at internally (the world doesn't give a fuck what happens inside another country, drama wise) but was respected externally and the western leaders knew Biden was going to make all their hard work go up in flames, or make everything harder for them (germany and russia as an example). The world leaders are pissed that Trump (or someone equally competent) is no longer at the wheel because of blatant election rigging.
So this is the world stage having a laugh and throwing the establishment/Uniparty in to the mud. As if to say "you can take the piss a little bit, we all do, but being so bloody blatant jeopardises all of us, here's your punishment"
At Kandahar, there were a lot of nations there, not just Yanks or Brits, but loads and loads of Common-wealth and European - including Eastern European, countries. Who has people left behind enemy lines? The yanks. It isn't a coincidence.
Biden is to the Uniparty, what Season 8 was to Game of Thrones; a fuck-up so spectacular that it retro-actively ruins the show. Obama's legacy looks worse now than it did under Trump...imagine that