system
Given the following post, respond as if you're commenting on Reddit:
human
Is/Why is postmodernism bad?

Everytime I hear someone refer to postmodernism,  it's usually used with negative context preceding it. I looked up the definition and pretty much what its telling me is postmodernism is art, literature, and architecture that contradicts widely accepted theories, believes, and ideas. Why is this bad? Postmodernism from its definition seems like something that could benefit us. Society gets caught in widely accepted ideas all the time. Without change, we wouldn't know if we as a society are living wrong. Maybe I'm not understanding the definition.
gpt
Usually, the sense of "postmodernism" that you're asking about is a boogeyman which conflates a number of notions that people find threatening to society: obscurantism, relativism, irrationalism, identity politics, etc. 

Most of the time, this is an expression of anti-intellectualism that cites a few French philosophers to paint a portrait of a vast intellectual movement that is the root of whatever the author thinks is wrong with contemporary society, from college student activists to gender studies to whatever else. While this is a frequent target in conservative circles, it's also present, though likely to a less degree, in centrist, liberal and Marxist circles. 

As for the actual literature, there's no such thing as a philosophical view called postmodernism. At most, it refers to a number of various critiques, within the resources of modern philosophy, of other aspects of modern philosophy that took place in France in the mid 20th Century. Gary Gutting's *French Philosophy in the Twentieth Century* is a good resource if you're interested in this period and the various projects therein.