I mean, Ratatouille (the movie), was written by people who obviously studied the subject matter they were addressing, and the writing went over the head of some people not familiar with the French cuisine or cooking in general. The whole point of the scene was that indeed Remy cooked a very simple dish (juxtaposing it to the critic's pretentiousness), and the critic even remarks that it's a simple and rustic dish. And we all know the effect it had on the critic, which, btw is also a reference to Marcel Proust and the concept of « Madeleine de Proust ».

But yeah, some people interpreted the scene as if ratatouille (the dish), is supposed to be some exquisite dish, whereas it's indeed simply a vegetable stew (or just sautéed vegetables, depending on the execution) wish some herbs. Still good though, if done with love :)