https://www.cnn.com/2023/06/30/politics/state-deparment-afghanistan-withdrawal-report/index.html
https://www.whitehouse.gov/wp-content/uploads/2023/04/US-Withdrawal-from-Afghanistan.pdf
From the last one:
President Biden’s choices for how to execute a withdrawal from Afghanistan were
severely constrained by conditions created by his predecessor.
....
Over his last 11 months in office, President Trump ordered a series of drawdowns of
U.S. troops. By June 2020, President Trump reduced U.S. troops in Afghanistan to
8,600. In September 2020, he directed a further draw down to 4,500. A month later,
President Trump tweeted, to the surprise of military advisors, that the remaining U.S.
troops in Afghanistan should be “home by Christmas!” On September 28, 2021,
Chairman of the Joint Chiefs of Staff Milley testified that, on November 11, he had
received an unclassified signed order directing the U.S. military to withdraw all forces
from Afghanistan no later than January 15, 2021. One week later, that order was
rescinded and replaced with one to draw down to 2,500 troops by the same date.
During the transition from the Trump Administration to the Biden Administration, the
outgoing Administration provided no plans for how to conduct the final withdrawal or to
evacuate Americans and Afghan allies. Indeed, there were no such plans in place
when President Biden came into office, even with the agreed upon full withdrawal just
over three months away
Seriously... have you all forgotten what went down? Memories like goldfish.
Oh, lets take a look at articles detailing the equipment left behind:
https://www.cnn.com/2022/04/27/politics/afghan-weapons-left-behind/index.html
https://www.cnn.com/2022/04/27/politics/afghan-weapons-left-behind/index.html
https://www.cnn.com/2022/04/27/politics/afghan-weapons-left-behind/index.html
https://www.cnn.com/2022/04/27/politics/afghan-weapons-left-behind/index.html
Oh... and if that's not enough for you, lets talk about the human cost of packing up just leaving:
https://www.nbcnews.com/investigations/us-left-78000-afghan-allies-ngo-report-rcna18119
https://www.hudson.org/foreign-policy/helping-afghan-allies-america-left-behind-luke-coffey
https://www.factcheck.org/2021/09/how-many-americans-and-allies-are-left-in-afghanistan/
oh, and our reputation on the world stage, because you know, we weren't the only western power in Afghansistan: https://www.npr.org/2022/08/29/1119973093/how-u-s-allies-view-the-country-a-year-after-its-withdraw-from-afghanistan
TL/DR: It was a shit show.