I think of The Dictionary of Obscure Sorrows as an art project. I never got the impression that we were supposed to start using these words. It's interesting and entertaining, like when I learned the Czech word "litost" from "The Book of Laughter and Forgetting" by Milan Kundera. "Litost is a state of torment created by the sudden sight of one’s own misery."
Part five of this book is about Litost, a kind of misery-induced torment only known to the Czech people. You could see it is a Slavic thing.
https://fictionbeast.com/milan-kundera-the-unbearable-ligthn...
Something akin to how I felt trapped in my own drama