The 'western' forces in Afghanistan have huge logistic problems. To put two feet on the ground they need twenty feet or more behind them shuffeling papers, organising and feeding the logistic queue. Their way of existence and fighting is incompatible with the country they are in. Too many trucks will not come through. The logistic lines are too long and to insecure. The road war will kill their mission.
What do I always say? Amateurs talk strategy and tactics, experts talk logistics. Don't matter how many great plans you have, if you can't support your operators, the plans ain't worth a shit. Ask the Russians about how many of their convoys got ambushed in the Hindu Kush. Ask their men how many helicopters were taken out by a buncha goat-humpers with AKs shooting down at 'em from the surrounding heights.
We shoulda learned from the Brits (read Kipling) and the Soviets. You cannot take and occupy Afghanistan; it's almost an impossible logistical nightmare. There should never have been 'boots on the ground'. We should have exacted a price for 9/11 (bombed everything into gravel and killed as many of 'em as we could) and then called it a day.