This is such a multi faceted problem. Afghanistan is and always will be a tribal country, and will always be a killing field for any other country which is foolish enough to think they can reign it in, Winchester Cathedral has memorials on the wall to senior military figures who served in Kandahar and other places we are all familiar with, these men served in the 1830s. The book the Far Pavillions covers this subject, from all sides, very well. As to Trump; whether or not he would have done better? I seriously doubt it because he was a loose canon, an egotist with the attention span of a toddler and frankly, on the odd occasion I see a recording of him pouting and posturing and talking rubbish I shudder, and I am thankful he is out. Biden is a disappointment over this Afghan issue, but I am not sure what else he could have done to make it any better, it is always going to end badly. But, i do agree, that it is a mystery how a country the size of the USA can end up with a choice of Trump or Biden.