I get the frustration, and agree that the typical negative reaction is irritating. However, exactly what response should one expect from a debt-laden person?
Back to the situation described by the OP, when people are sharing stories of common struggle it's simply a form of group therapy (I leave whether it is effective or not unaddressed). I'd let them have their moment and simply blow off any perceived slight. For me, an important part of communication is recognizing the state of mind of the other party. Just be nice and let it go.
Also, I just don't bring up finances when I can help it. Generally speaking, it serves no constructive purpose. Unless someone asks for your help, your advice and accomplishments likely won't be well received by someone who is struggling. I wish it wasn't the case, but it's just human nature.