In the name of solidarity, I present the reasons Dan Dislikes Chat:
- Chat is, effectively, unusable from a phone, my preferred and most frequent interface to SE.
- I talk too fast and Chat doesn't talk fast enough. Whenever I log in I see something like "14 users currently chatting, last message sent 2 hours ago".
- Due to (2), I often feel anxious that I'm ignorant of and swimming against the established culture by flooding the channel with a bunch of ADHD comments pursuing whatever tangent my hamster brain has latched onto.
Given the above, I participate rarely in Chat, so I can't say one way or another if the politics are more or less rancorous or the commentary more or less snide than on the main site. I'm not even involved enough there to judge if the remark you quote is the barb you think it is, or the unrelated comment others seem to take it for (which is why I'm unable to vote on your question one way or the other).
But it doesn't matter because the cure is the same either way. To quote the second most imperturbable member of the site¹:
Richard Feynman's last autobiographical work was entitled What Do You Care What Other People Think? I can't aspire to reach his intellectual level, but I try to emulate his attitude. Who here do you empower to distress you?
So long as you know what you're worth, whether you were smeared or not is irrelevant².
¹ Sorry, I have to award the diadem to Sven; you couldn't flap him with a giant pancake inverter.
² Protip: If you've never experienced the warm glow of magnanimity that spreads through you when you give someone the benefit of the doubt, then I can personally recommend it. Wonderful tonic for the ego.