I don't doubt some of his policies were good, but they don't really get mentioned in books. They ought to. Maybe one of the reasons that Paul is mentioned badly in books about his mother is because it doesn't usually focus on his own reign but rather on personal qualities that maybe are exaggerated.His policies were unpopular, and if they had not been, he would have survived longer. I think his military policy had much to do with Prussian style military reforms which were silly, and that harked back to Peter III. They were not important reforms, they just made him look silly and they were not very popular. Also, venerating Peter III's memory as he did wasn't in good taste, etc.