i am not agree, US has achieving much of their objectives there in Afghanistan
1. Taliban Government in Afghanistan collapse, chek
2. US to put their allies as in helm position in Afghanistan new government, Check
3. Confine and chasing Talibunnies in their holes and safe heaven in Pakistan Tribal Area, Check
4. Disrupt and severing their abilities to carries Global terrorism, Check
5. Killing or capturing much if not almost all of their prominent leader, Check
6. The creation of New Afghanistan National Army, Check
7. Gather much if not all of Afghanistan Northern Area community to resist against Taliban and their Al-Qaida off shot, check
See, I don't see Talibunnies is still in strong position like your suggest, and the facts has proven otherwise. The American did a much better job in Afghanistan than the Russian (Soviet) who can't win the hearts of local peoples.