Cold turd doesn't sound very nice to me.
But, I have seen some people insult each other left and right as some form of banter. As for T, the person could talk to the T about it.
I once told my T that she offended me. She said something about they should put anti-depressants in the water. Since I have a preference for talk therapy and distrust most drugs, this offended me. It also excluded me from being able to talk with her about my pros and cons list on whether to see a psychiatrist. But, I don't think she was trying to hurt me or offend me. She just was frustrated with this rather unhappy woman who clammed up at the mere mention of anti-depressants. So, she ended up frustrating me with her rather overly anti-depressants are as safe as aspirin remark. But, it's okey to tell a T that he/she blew it that time. They do that at times. I know mine does at times. But, she cares about me and sometimes nails the bullseye.