I hate to get into this trolling game but since you asked I think the russians learnt their lesson with thousands dead, left afghanistan and USSR crumbled. Does it answer your question?
So you were on the ground and saw this whole episode first hand, you are in UK relying on what ISPR is feeding you. Wake up! At least I am not following with the Afghan side is feeding me blindly be objective for a while, we don't know the details.
US presence is in our interest, they are our partners and thus we support her with open arms.Once the interests diverge then we will stand up to them the way we have stood up the British, the Russians and so on..
Anyways I am done discussing this, we are running in circles.