> They control the territory.

Only after a voluntary retreat, so that is irrelevant since they didn't have power at the time of the treat, and were not a factor in the decision to retreat.

> It is a weird definition of "victory", when the end of the war was a hasty and poorly executed retreat.

Of course it was a victory. The Taliban were ousted within weeks and then the place was under US control for 20 years. If it wasn't a victory, the last 20 years would have been like the last year instead of what they were like.