Well, CH, if the deal was solidified February 29, 2020, was it not incumbent on the Trump Administration to get drawdown under way, accomodate safe removal of personnel, equipment? Instead, it did close to nothing, looked the other way while the Taliban violated the agreement, then dropped that particular hot potato in Biden's lap with only a few months left to meet terms.
Thousands of people and 20-ish years of hardware which has to move -where does it all go? What clearances, fly-over permissions are necessary to get it there? How many bureaucratic hoops must be leapt through to secure the necessary paperwork? How many heavy carrier planes are available to do the job? How many hours will it take to remove it all? How many people need remain in place to get it done? Bottom line is Trump (or more likely his underlings) created a logistical nightmare and then dropped it Biden's lap... and all the red-hatted armchair quarterbacks predictably undertook a screeching narrative of "all Biden's fault" when the situation inevitably went south.
But let's circle back to the Taliban abrogating the terms, continuing its attacks on the Afghan government, military after the agreement was reached; Biden could have simply declared it in abase and discarded it, kept U.S. troops on the ground rather than sticking to the deal. But then the red-hats and right-wing talking heads would probably be whining about how we're still in Afghanistan after two decades and screeching a differently flavored "all Biden's fault" narrative.