Shylock... Villain?

I do believe Shylock is a villain in the play. A villain can be someone who seeks revenge, only for the benefit of themselves. And Shylock shows this because he so viciously seeks revenge from Antonio, and fights so hard to get what he thinks he deserves, whether it is Antonio's life, money or respect. Also, the way he is so cruel, especially Jessica and Antonio, can only be described as villainous. For these reasons I do believe Shylock is a villain in the play.