Does marred mean spoiled in Romeo and Juliet?

No, marred does not mean spoiled in Romeo and Juliet. In the play, marred is used to mean damaged or injured. For example, in Act 1, Scene 1, Romeo says, "Is she a Capulet? O dear account! My life is my foe's debt." Romeo is saying that meeting Juliet has ruined his life because she is a member of the Capulet family, which is his enemy. In this context, marred means ruined or destroyed.