The unchangeable tragedy of all human life is that, however long you study the restaurant menu, when the food arrives everybody else's dishes will look better than your own. Next to this suffering and being alone in an absurd universe are mere hors d'oeuvres.
The Germans have a word for it. Futterneid.
Futterneid is literally food envy and is the feeling you get when somebody's else meal looks and smells better than your own. So far as I can tell (and I'm not at all German) the word can also be used figuratively.
It makes a lovely pair with the old Scots verb to groke, which, as those of you who've read The Horologicon will know, means to stare at somebody while they're eating in the hope that they'll give you some of their food.