How can politics and history be so easy to categorized into black and white? Have you read Mao's works yourself to understand him and his role in the Chinese revolutionary struggle? Not saying that what you say is completely invalid. But to criticize an important historical figure and ask others to trust in your judgment, you should at least make an effort to understand the person and the historical background. Otherwise, what you say is just silly propaganda.
The life-saving straw cannot be blindly believed, but you must master the method to save yourself, and the method naturally exists, because he left the last hope.