It is not controversial to say that the food quality in the USA is bad. All that corn syrup and a lax attitude to regulation and additives has not done any favors to the health of the average American.
At the same time, it's not the only developed country that has a problem with food-related disease. For some reason, though, there are a subset of people on social media who seem to believe this.
At this point, it's almost cliché for a wealthy wannabe influencer American to go on a European holiday, pig out on delicious food, and act astounded that they have lost weight and are feeling better in themselves. This is exactly what one TikToker did recently, prompting a viral reaction. She was so impressed about how healthy she felt after eating luxurious restaurant meals all day that the whole thing started an intense Twitter discussion. While most uniformly agreed that American food could be bad for you, many were suspicious that the whole stress-free vacation part of her trip might have been what triggered her digestive contentment. At the end of the day, cheese is dairy no matter what color it is.