Elections have consequences.
According to UNAMA, for the same period, Afghan civilian casualties increased each year under Obama (Thanks, Obama), held steady under Trump while the peace process was being negotiated, and declined 30% in 2020 to the lowest in 8 years. The numbers are what they are.
More time would have been ideal, but elections have consequences, and Biden is on his way, so it is what it is.
https://www.methylated.net/2020/11/28/according-to-unama-for-the-same-period-afghan-civilian/