The correct answer to this open question is the following.
Wilhelm’s character and his statements before the war contributed to France and England seeing him as the supreme leader of Germany during the war in that he expressed bravery comments in his speeches, harsh words to his enemies, and the swagger he supposedly showed in public events and interviews. He used his title of Supreme War Lord to bluff because in reality he had a big ego but was a poor ruler that tried to find ways to avoid a military confrontation with other countries.
