Why Hitler is cast as the worst naval commander

Who was the worst admiral or naval commander of World War II?

Hitler, because restricting German capital ships simplified Allied convoy defense and weakened the multi-axis Atlantic threat.

The answer first separates incompetence from bad luck: a commander can make a reasonable decision from incomplete information and still lose. Adolf Hitler is then chosen as the war's worst naval commander because he restricted German capital-ship operations. Removing the surface threat let Allied convoy planners concentrate more heavily on aircraft and submarines. A simultaneous threat from Condors, U-boats, and surface raiders would have forced escorts and routes to cover several attack modes at once. Command is judged by how decisions shaped the enemy's problem rather than by tactical defeat alone.