I want to take a girl on a date to my ex's work
Are you kidding? Why would you take a date to your ex's work?
I want to make my ex mad that I am dating another girl
You are purposely flaunting a new girl's in your exe's face and trying to make her upset on purpose. You need to move on and be more involved with your new girlfriend and less concerned with your ex.
You are not the boss of me. I don't respect you.
I'm just saying it's wrong to upset people on purpose. You should go somewhere else with your date.