How Overpowered Characters Can Ruin A Story

It would be best, I think, to begin by defining the relevant term. An overpowered character is one that is far more powerful than the other characters in a story, to the point that the character in question may seem perfect or even god-like to the other characters. But how would such a character ruin a story?

Let’s consider a typical fantasy scenario: a group of heroes are on a journey to defeat the villain. The group contains five characters: a wizard, a ranger, a warrior, a priest, and the...