Weaknesses of the Weimar constitution ~
Article 48 stated that in a crisis, the chancellor could ask the president to pass a law without the consent of the reichstag. By 1930, the chancellor regularly relied on this, making the constitution seem weak
During the german revolution, the government used alot of force, often relying on the army to subdue riots. Because of this, many parties in the reichstag openly hated the new constitution