Review Detail of slackerlife in The Mysterious Heiress: Researcher In Disguise

I'm tired reading this type of novel, like why? Family/relative-related enemy, dumbass extra/side characters who immediately sides with the other despite not knowing the whole story, always looking down on MC despite showing that she's not a useless person... A lot of novels that I've read has those type of elements and I'm really getting tired of it, especially the last two. Why are they so dumb, so easily manipulated into thinking that way, despite all the events involving MC? Why do they still look down on her, despite her showing at least some of her great talents as though her achievements isn't that amazing? I wanted this shitty girl (hateful cousin)LCW to be over with as soon as possible, but it seems as though it would take a little more time. I even feel like that, after LCW is over with, the next one might even be a love rival trying to get in the way between MC and ML. One of the most annoying and cliche part of some, if not most, novels. I stopped reading cause I couldn't bother to continue reading this type of plot anymore.