Biden was under no obligation to continue with what Trump did. Biden ended, often immediately, many other things Trump started and were in progress, so he could have done that here too. Instead, he shortened Trump's timetable, and forced a rushed and chaotic withdrawal on the military.
Your position is garbage.
What? Biden presided over a rout, a singular event in US military history, so in that sense, yes he did what no prior POTUS had done, hand a foreign enemy a US defeat that looked horrific.
Biden accelerated what Trump did, and you have no proof that if Trump had carried out his negotiated plan it would have turned out the same way.