Why was President Wilson dissatisfied with the Versailles Treaty?

Woodrow Wilson was dissatisfied with the Treaty of Versailles. He was an idealist and wanted to build a better and more powerful world from the ruins of the first world war. He agreed with the fact that Germany should be punished for what they did, but to an extent. He was worried that if they treated Germany too harshly, then Germany would someday get revenge. Woodrow Wilson believed that all nations should agree and cooperate to achieven world peace, which is why he set the league of nations up and wrote the 14 points.