Postmodernism is a fancy word that some people use to describe a way of thinking about the world that says there is no one way to be right. This means that different people can have different opinions about what is true, and none of them is wrong.
But some people don't like postmodernism because they say it can lead to confusion and make it hard to know what's really going on. They also think that postmodernism often ignores some important facts and ideas, and that we need to have a shared understanding of reality to make progress in things like science, politics, and art.
Critics of postmodernism also say that it can be used to justify bad behavior, like ignoring the rights of others or making up your own facts. They think that everyone should be held to the same standards of truth and honesty, instead of just doing whatever feels good or convenient.
So while postmodernism might make some people feel free to think for themselves, others worry that it can lead to chaos and bad behavior. It's up to each person to decide for themselves what they think about postmodernism and whether they want to use it to guide their thinking.