Probably hard to figure out if it is their issue or it is really in the way you are communicating. Passive aggressive is anger coming out in all sorts of weird ways. Sarcasm being the most common. Tone of voice and little nuanced things and body language. I guess it takes a lot of self honesty to figure out if it is you or them. I used to want to record my daughter and the way she talked to her mother. if she heard herself on tape i am sure she would have been shocked. i never did it though. probably hard to video yourself because then you would be playing to the camera. if there is a pattern then maybe take a look at yourself and what you could do differently.