Experiencing a Happy Ending With a Scum Shou

Out of boredom, Li Dong one day read through a whole list of books about scumbags male leads and their abusive possession of the submissive male protagonists. His thoughts: Damn it, all the protagonists are so lowly! I want to hit someone! How can this kind of book have a happy ending! Actually, every book has HE! Why is the male lead always so easy, being practically disabled by his male partner yet still staying deeply in love with the scumbag who gave him away! Li Dong was so frustrated, but then, he suddenly transmigrated as the evil male partner in every book! Source: NU