Not to be rude, but where do you sit on the org chart at your work, and is it a large organization?
The people at the top of the food chain are often the most vulnerable, because by the very nature of the pyramid, they are farthest away from the fact gathering and thus have the least ability to determine whether the information is true or not. To that end, they must rely on the information they receive from people who supposedly know what they were talking about. i’ll give you that the person on top needs to have it ability to tell whether or not they are being bullshitted - and to have their own people that they trust act to vet info. that said, military people are really good at military stuff, but often seem to suck at the political and cultural ramifications of their military actions.
If the intelligence community fed him the information that led to his ultimate conclusion and opinion, that is not on him. It is indeed on those under him who gave him that information. And if the buck stops with him, well, that’s as it should be. But it is no way says he is incompetent. It certainly indicates that other people may be.
i’m limiting this to Afghanistan. your blaming him for the outcome of the Ukraine invasion is ridiculous.