We can't blame both USA to be in Afghanistan AND to leave Afghanistan. People criticized both decisions. It reminds me Saddam, I'm not an expert but if I'm correct when he "died", if he really died, because I don't know what to think about this, it has been really quick for extremistes to take power. There are a lot of dictators that are appreciated by people, not because they are good people, just because they are not as bad as other ones. So from our point of view they are far from good people, but if you kill them the ones who would lead the country would be no better...
EDIT : It's like chosing between corruption or fundamentalism...