Comments of chapter undefined of Taking It All From The Protagonist

From the pieces I gathered, the protagonist from the novel was incompetent and someone strong in the future. We know that the MC hates him to the point he wants to ruin his life. Why there isn't a villain tag is beyond me. I find it a bit hilarious he hates a character from a novel so much he want to ruin a person's life who had nothing to do with him personally to warrant the hate at this current point in time.