Mu Rong Qianshan kept putting false labels onto Qin Wushuang for he clearly intended to suppress him through his imposing manner. He wanted to make Qin Wushuang feel as though he lacked reasoning.
However, in terms of Qin Wushuang's personal character, what kind of situation had he not seen? The imposing Heavenly Emperor had not made him a coward, so there was no reason to feel defeated at the Floating Snow House.