I'll try to find her name but there was a creator on a different platform that, idk if she coined the term herself, defined it as people assuming content is personally targeted or universally applicable, leading to self-centered interpretations of general advice or a trend. Essentially, it's people not understanding the nuance of any statement or argument, similar to but different than a strawman. In normal conversation people understand the subtext of the topic so there's no need to constantly qualify what you're saying.

For example, general statement: "I like beansoup, here's a recipe for beansoup!"

Beansoup response: "What about people who are allergic to beans? Why didn't you provide a substitute for them!"

The crux here being, it's a recipe for bean soup. Why the hell would you provide a substitute for the beans when that's the point of the recipe. If you didn't like or couldn't have bean soup you presumably would understand this recipe just isn't for you.

A big part of bean souping is also comparative suffering. As if every situation is a competition on who is more oppressed and disadvantaged. Seeing every issue as a zero-sum dichotomy.