Walk away
I could handle the backhanded compliments and schoolboy taunts.
But as I was composing a long reply, I realized I was talking about something I didn't really want to talk about. What's more, I was investing time and effort doing it.
I'll give the guy another chance maybe in three months or so.
But I don't like him, I really don't enjoy extended conversations with him, and I don't like what he brings out in me anymore.
Better to walk away.