Ick. I've kind of had this experience, however slightly different.

When I was self-harming, my very sarcastic T would say "And how's that working for ya?" or something along those lines to try and get me to think differently about it.

I eventually had to ask her to stop saying that because it was making me feel incredibly ashamed, adding to my already shameful mindset about it, and thus perpetuating the self-harm.

Would you prefer your T not say those things to you or use phrases like that?