Draco's not really a bully. He's not exactly the biggest, strongest guy in the world. He's more a rich, snobby person. He thinks of himself as really cool. ↗
You see another side of Draco when he's with his dad. When Draco is with his dad, he doesn't say anything. He keeps his mouth shut. He's sort of bullied by his dad, so he acts very different. ↗