Just a two minute video to help understand existentialism.
For the Existentialists, the self can be a prison, a trap, and a source of great anxiety. Heidegger called selfhood a condition of being “thrown into the world.” By the time we realize where and what we are, according to restrictive categories of historical thought and language, we are already there, inescapably bound to our conditions, forced to perform roles for which we never auditioned. Jean-Paul Sartre took this notion of “thrownness” and gave it his own neurotic stamp. We are indeed tossed into existences against our will, but the real condemnation, he thought, is that once we arrive, we have to make choices. We are doomed to the task of creating ourselves, no matter how limited the options, and there is no possibility of opting out. Even not making choices is a choice.