Everyone has been commenting how toxic and scum Jiang Yu is but as the story unfolds, she too suffer from everything that she has gone throughout her life. The reason she has been paranoid and anxious when she lost control over someone is her own traumatic experience during her childhood and during her time with Qi Yan. If Qi Yan thinks that she's the only one who hurts, she too hurt Jiang Yu to the point she isn't confident to love someone else. Even if it's quite toxic, for someone like me who's suffered from depression and anxiety plus with harsh childhood conditions, I always thought that I'm unfit to be loved by someone. But the way writer wrote the story it's as if telling us that everyone suffers from something and it's not all their fault why they behaving erratically to the point they couldn't controlled their emotions and feelings. They just needed someone to help them through their changing process. We too wanna change to be better person