School life took an upturn in Draco's fifth year. Although forbidden to discuss at Hogwarts what he had heard at home, Draco took pleasure in petty triumphs: he was a Prefect (and Harry was not) and Dolores Umbridge, the new Defence Against the Dark Arts teacher, seemed to loathe Harry quite as much as he did. read more
So we can figure out that the annoying and show-off capabilities were in the Malfoy blood. Yet, there are some reasons which made Draco hate Harry. Harry was the boy who lived. Yes, that is a pretty good reason for a child like Malfoy to hate Harry as Harry got all the attention and respect from the teachers that Draco wanted for himself. read more