Which TV or movie character is often seen in a way that doesn't really capture who they are?

[Scorpion]

In many movies and TV shows, some characters are not understood as well as they should be. People make wrong assumptions about them because of how they act on the outside. Characters like Snape from Harry Potter and Elsa from Frozen are good examples. They are judged too harshly and not given a chance to show what's really going on inside. What makes these characters special is that we learn more about them and find common ground. Why do people make wrong judgments about them?