Tell me the name of a good novel you've read, but the webtoon disappointed you.

I read " trash of the count's family" , " things that deserve to die " and " turning " novels, but when i read their manhwa it was disappointing, in turning and trash of the count's family, a lot of important scenes were skipped, The battles looked very bad and short , Also, the characters' expressions are never the same; cale makes a lot of stupid .faces all the time, while the novel describes him as having calm expressions, and his inner thoughts in the novel are spoken aloud in the manhwa , in the novel cale wears the simplest clothes unlike or cale who overdress , and it's very important detail about kim rock soo's personality . Same thing for yuder , in the novel they say that he has a calm expression but in the manhwa he doesn't, also yuder thinks a lot and in a romantic way sometimes but there's nothing like this in the manhwa, he lacks to character, and let's not talk about things that deserve to die and these unessesery panels.
Anyway i understand that the artists are doing their best, i know that being an artist is hard , and i think their art is good, but they really need to read the novel, and understand it, it's not about art