Your efforts are paying off, good work!
areivim said that I was suggesting you take an “It doesn’t matter to me” attitude. Which is almost, but not quite, what I meant. It certainly does matter to you; it is just that it is out of your control. Which is why I don’t suggest that you try to get this person to speak to you in sentences. Maybe he has a reticent or introverted personality. Maybe he doesn’t speak to anyone in sentences (I know people like this).
But you should not stand around and take verbal abuse from this person either. So my suggestion was just that you try to get him to see you as a person by chatting with him occasionally. Don’t try to make him into a different person, just make him see that YOU are one. Hopefully, he will soon be able to see you as something more than just a vessel to receive criticism.
If he still only criticizes you after all your effort, well, there are always other places to work.