The treaty was widely seen as a harsh and unfair punishment of Germany. It required Germany to give up territory to the Allied Powers, pay reparations, and disarm its military.
The treaty was unpopular in Germany, and many people felt that it was too harsh. This resentment contributed to the rise of the Nazi Party and Adolf Hitler, who came to power in 1933. Hitler promised to overturn the treaty and restore Germany to its former glory.
The Treaty of Versailles is considered a diktat because it was imposed on Germany without its consent. The Allies did not negotiate the terms of the treaty with Germany, but rather presented them to Germany as a fait accompli. This caused a great deal of resentment in Germany, and helped to create the conditions that led to World War II.