Maybe consider that you can be as annoying and frustrating to them as they are to you...
I'm currently discussion the Real Presence right now with a not-actually-friend of mine on FB. He's a pretty annoying fundamentalist Calvinist type. It's annoying, trust me; but I willingly entered into the discussion. If I get annoyed, I'll just say thanks for the chat and drop out.
I don't usually comment on his posts, so I'm not a major annoyance to him. But for the sake of argument, it's possible that I might be annoying HIM. I responded to a post of his and things went from there.
I know that we sometimes paint ourselves as the righteous heroes of our daily stories, but have you considered that your zeal for Orthodoxy and "good theology" etc, is actually profoundly annoying and grating and bothersome to the people in your life?--on FB, your family, your friends, schoolmates, etc.? I mean, let's be honest, often in these little narratives, we're the ones just a'prayin' peacefully in the corner, just loving people, and loving God, not bothering anyone else -- then all of a sudden these papists and anabaptists and atheists just start confronting us. Let's be real...that's not how it goes down.
You are complicit in these difficulties as much as anyone else is.