Why did the Revolution of 1911 become the last straw to overthrow the Qing Dynasty?

Social contradictions, the Qing government became a tool for imperialism to control China, and the failure of Westernization Reformers made the bourgeoisie think that a more thorough revolution should be launched (in fact, the Revolution of 1911 was not thorough). Later, because the national revolutionary fire was ignited, the Qing Dynasty lost its ability to control China in an instant, so all the warlords and imperialists did not support the Qing government. Driven by long-term national feelings, the Qing Dynasty will definitely collapse soon.