Your flimsy threats of drama and screenshots and failure to explain what's actually bothering you are way more annoying than Patient Zero joking about the counter in large text.
I also can only presume you even told him to make his text big, as this is what he claims and you have not denied it or provided the full conversation.
You cannot make your drama sound more legitimate by tacking on phrases like "attention whoring" when he's mostly trying to ask what your problem is.
At this point, I'm more likely to preemptively ban kxait than Patient Zero.