There are many reasons why a good novel ends badly. Here are some of the possible reasons: 1. The plot is too big to progress smoothly: Some novels have a huge plot outline at the beginning, but for various reasons, the subsequent chapters cannot progress smoothly, resulting in the novel not ending. 2. The characters in the novel are the soul of the story. If the characters are not full, the plot will be difficult to attract people. If the main characters in the novel did not have enough charm and depth, it would be difficult for the readers to follow the development of the story. 3. The logical contradiction of the story: The story of the novel needs to be logically reasonable. If there is a logical contradiction, it is difficult for the reader to maintain interest. If there was a logical contradiction at the end of the novel, it might cause the reader to have doubts about the story and affect the quality of the novel. 4. Lacking writing skills: Writing a novel requires skill. If the author lacks writing skills, the quality of the novel may decline. For example, a lack of narrative skills or description skills may cause the reader to be unable to understand the story or the characters. 5. The novel itself is not good enough: Some novels may be very popular at the beginning, but because the content is not good enough to attract the interest of the readers, the novel will not end. There could be many reasons why a good novel ended badly, but the main ones were that the plot was too big, the characters were not well developed, the logic was contradictory, and the writing skills were lacking.