Winning a war is easy.  
Governing is not.  


The US was doomed from the start when it came to invading Afghanistan, it was stupid and foolish.  
We spent 20 years, billions of dollars for it to crumble within a matter of weeks, if your idea is to "just spend more money, more time, just send more of our soldiers to perish" then you're falling for a sunk cost fallacy.  


The smartest thing we have ever done when it came to Afghanistan is withdraw.