What are some of the problems author David McCullouch finds Ferdinand de Lesseps has as being key to his failure?

David McCullouch finds a crucial problem Ferdinand de Lesseps has that is key to his failure is his inability to grow old. He also fails to trust the experts he surrounds himself with. Instead, he insists on things going his way regardless of whether or not he has expertise. He disregards facts and data. Finally, he uses his incredible amicable persuasion skills at winning others to his perspective.