Lu Bu's Brother, Bound to the Poison Master System and Killed Like Crazy

Why do I feel that this male protagonist is like a white-eyed wolf? Lu Bu has saved him several times. Without Lu Bu, the male protagonist would have died long ago. However, the male protagonist always looks down on Lu Bu, despises him, and treats Lu Bu as a tool to be used. His attitude towards Lu Bu is usually very cold. He is really a white-eyed wolf. On the contrary, the character of Lu Bu in this article is really refreshing and generous.