In The Incredibles, Supers are both physically and morally superior to everyone else, working selflessly to keep society safe. The common people (bar a few exceptions) are tiny, petty and selfish, and would rather see superheroes gone than let them operate freely for the benefit or everyone. And the villain even says that he'll give away his inventions so that everyone (not just those deserving) can become a super, and this supposed to be a bad thing.
In Ratatouille, Remy is the one with the gift of cooking and Linguini is just an impostor. Remy is unfairly "discriminated" for being a rat, while Linguini only succeeds by leeching off of Remy. Only at the end are things set right with Remy as the head chef of the new restaurant and Linguini as a mere waiter. Linguini doesn't improve and become a better chef, living up to the legacy of his father, and he and Remy don't even become friends by the end, just co-workers.
The villain is also a tiny, jealous petty asshole who wants to steal the recipes of the dead great chef and "cheapens" them by selling them to the masses as frozen food.
The message of both movies seems to be some people are just naturally better and we should let them occupy the place at the top they deserve and society will be better off for it. The rest should be content with their lot.