I don't know you at all, so I wouldn't assume I know what you do/dont like. But, I will say that it did seem like it was bothering you that he wasn't understanding what you were trying to say.
I will also say that it seemed like you were pretty clear the first 3 or 4 times you tried to explain it. I'm not saying anyone here is a genius, but I think everyone here is smart enough to understand what you're saying. So, since he kept acting like he didn't hear you, it made me think it was a troll attempt. I agree, I think initially he was doing it to get a "I told you so" out there. But, when he realized it wasn't going to happen he figured he might as well run with it.