Looking for non-series books with sarcastic or mean character. NO ROMANCE.

I’m way more interested in the characters than the plot so, I’m open to any genre. The biggest thing is I don’t want romance. AT ALL. I hate reading romantic scenes or crushes or anything like that.

I would prefer a book without a sequel but I can tolerate up to three books.

I love reading characters that aren’t the nicest. Maybe their personality just sucks or they are more of an antihero or a villain. Doesn’t need to be the main character but I would like them to be a major character.