For me it’s detailed describtions about people’s dreams.
Not only doesn’t your story make any sense, but you’re also telling me about something that didn’t even happen. It’s kind of like telling about an event, and then ending the story by saying you just made it all up, except with dreams you begin by telling it’s all made up. I’m already not interested before you even started.
Usually it’s culture that’s not their own, from a position of expertise. Theres a fairly good chance of putting out some really bad info and it can also come off as racially or culturally insensitive - which I want no part of. Extra cringe when it’s your own culture that they’re talking about and you’re put in that awkward position of having to do an ackchyually…