I really hate people who hit low blows then double down with“I’m just telling the truth”

Ever been in an argument where someone has hit you with a low blow, and you understandably get upset? Then when you confront them, they get defensive, saying that it’s “just the truth” and it’s “something you need to work on anyways?” It just makes me so mad because, they always frame it in a way where your behavior is “concerning,” but my point is if you were truly intent on “improving” my faults you should mention them in a completely different environment. Like you said that low blow to hurt me in an argument, not to point out something that I need to improve. If you are going to hit the low blow, own up to it yk?