Who was to blame for the signing of the Treaty of Versailles

Ebert was reluctant to sign the Treaty but had no choice as Germany could not go to war, however Ebert and the Weimar were blamed for the treaty. Germans believed they had been betrayed by the governments who didn't dare to continue the war. The reparations bill was announced in April 1921 for 6600 million to be paid in early instalments of 2% of Germany's annual output.