Yup, the brigading sub was r/iamveryculinary. The "chicken sandwich drama" was in r/food.

If you don't remember brigading you probably went to IAVC in its earlier times. Back then the sub just picked on content where users were bossing each other around on food opinions. That was fine, but in Reddit it is not sustainable in the long term.

Eventually the sub got filled with oversensitive and assumptive morons with the reading skills of a potato, always assuming that any food opinion was someone trying to boss them around, and reinforcing each others' assumptions. Nationalism also became a commonplace there, since the users there were too stupid to not generalise. With the unmoderator in question (TheLadyEve) disingenuously pretending that the admins, in one of their few instances of sanity, were persecuting the subreddit to curb down its brigading tendencies, even if she knew that the only way to prevent the brigades would be to close down the derailed subreddit, but I guess that an assumer like TLE wouldn't be able to do it.

It reached a point where, if you found some comment being downvoted into oblivion in r/food, r/cooking or r/askculinary, with random insults, you could pretty much guess "this was linked in r/iamveryculinary".