Everyone assumes that Dennis Nedry is the villain of Jurassic Park, but John Hammond is pretty bad, too. After one of his workers is killed by a Velociraptor, Hammond doesn't even blink twice. Before the park even opens, there's already been casualties. On top of that, Hammond has one interaction with Nedry and it's incredibly hostile. He literally yells at Nedry for his personal financial situation. Sure, Nedry might not be a nice guy, but Hammond is an incredibly rude and unprofessional boss towards him. By creating a hostile work environment, Hammond is partially responsible for Nedry's actions.