I think this is called by many “postmodernism” and it is found on the right and on the left - though far more on the left. Foucalt was a big proponent. He rejected the label but others ran with it:
Although postmodernism isn’t as strictly defined as other philosophical movements, one can still clearly say what it doesn’t represent. Postmodern philosophy is typically associated on the internet as feminism/multiculturalism/Cultural Marxism, although it is none of that at all. It may have some loose ties by influencing some feminists and critical theorists through some scholars such as Foucault and Deleuze, but you can’t really mash all of them into a same philosophical movement.
Cuck philosophy forwarding Judith butler in the video description as a credible source is damaging to his reputation. Other of his videos have been debunked before.