It turns out Karen isn't the biggest complainer of them all.
Despite the trend of referring to anyone who complains a lot as a "Karen", it turns out Karens do not top the list of the names of people who complain the most - but they're not far.
To figure out the list of the top complainers, UK-based comparison site Uswitch looked at the Trip Advisor reviews for some of the biggest landmarks in the world, including the Sydney Opera House.
Their research showed that the Eiffel Tower in Paris is the landmark that people complain about the most, with 17,000 negative reviews.
They also ranked the biggest complainer, after analysing thousands of pieces of negative feedback.