Existentialism is profoundly individualistic, and I think that is part of the appeal to some people, but I think that intense focus on the individual is what makes the existentialist world view so sad.
The image of the lone hero standing in a sea of absurdity may have romantic appeal, but it isn’t real. The world isn’t absurd. There is order. Natural laws are followed, even if we don’t fully understand them, and the universe keeps spinning.
Does that mean life is fair? No. I don’t think that those natural laws care much about fairness but it does mean that we are part of something far bigger than ourselves.
Is that the meaning of life? Probably not. To be honest, I don’t have a clue what the meaning of life is, and I think that is ok. But I do know that even if every man is an island, underneath the waves we are all connected.
No man is an island entire of itself; every man is a piece of the continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as any manner of thy friends or of thine own were; any man's death diminishes me, because I am involved in mankind. And therefore never send to know for whom the bell tolls; it tolls for thee. John Donne, 1624