We could have ten times as many troops there but we still couldn’t root out all the Taliban.
Our troops had the same problem in Vietnam, trying to root out all the Northern commie Vietnamese. It's a no-win.
My read is that the locals should dump them. We can arm and train them as we did the Vietnamese. I hate the idea of American soldiers dying for a group of people who will, in the end, reject us and ask us the leave IMMEDIATELY. "Thanks and bye-bye now."