I really feel bad fir Guo Moran. One mistake destroyed his life. His love for Wen Qing not less than Huo Tingshen but he lost her for one mistake. There is no punishment in the world as worse as regret.
Guo Moran's regret
He has blamed her. Never stood on her side even if he knew her whereas tingshen is unconditionally there for her. He has always entrusted her