I can totally understand how one might find Kelly & John annoying, but I think they're funny. I think that her yelling at him and then him telling her to fuck off is just their way of relating to each other. It's not my idea of a great relationship, but I actually think that they are happy together and that's just how they related.
I've disliked Reichen and Chip from the beginning. They're much too calculating and snotty. I also don't think that being in a stressful situation is ever an excuse for rude, obnoxious behavior to strangers.
Anyway, I miss the clowns already...