Hitler was, for the most part, a very strong dictator. The only major weakness he had (in terms of his ability to control the people) was the fact that he was worried about the degree of loyalty that the German people felt towards him.
Because of this fear, Hitler did not ask his people to make the kinds of sacrifices that the British and even the American governments asked of their people. Hitler did not impose rationing on Germany. He did not push for women to work in the factories. The fact that he would endanger the war effort out of fear of rebellions is the major evidence that he was a weak dictator.