@OldAndCranky I found a great word for this in “The Dictionary of Obscure Sorrows” by John Koenig:

aponemia - n. The peculiar quality of never having chosen to be born, which is shared by everyone else around you; the curious awareness that even though earthly life might be the most exciting party in the universe, somehow everyone in attendance had been dragged here by a friend or stumbled in by accident.