Whatever military force was in Afghanistan never posed any sort of credible threat or resistance against the US military. The "resistance" that the US military faced came in terms of the US military wanting to try and recreate the society there, and having troops attacked while just driving around or facing resistance while conducting raids. If the US military wanted to, they could have easily destroyed every single living being and human structure in Afghanistan without much effort, they just didn't because they don't do that kind of stuff as a matter of policy.