I'm such a good-for-nothing. I can't do anything. I can't even write my novel properly.

Self-deprecating characters often appeared in web novels, but such situations did not happen often and should not appear in novels. An author should create characters with self-confidence and self-esteem and use their actions and conversations to push the story forward. If the character really does show signs of self-deprecation, you can consider correcting this situation through plot and dialogue. For example, through the dialogue between the characters, they could show their respective strengths and values so that they could grow and improve in the story. Punctuation is very important when writing a novel because it can affect the reader's understanding and acceptance of the story. Therefore, special attention should be paid to the use of punctuations to ensure that the story is clear, smooth, and easy for the reader to understand.