Fan Casting The Snark Knight in Sort by Tropes

This character has a world-weary disdain for everyone, themselves included. They might see themselves as the Only Sane Man, but only in the sense that they're maybe one full notch above everyone else while still falling miles short of where they believe everyone should be. They typically suffer from a healthy dose of Intelligence Equals Isolation, and are the type to stand aside at parties and quietly drink beer while making biting quips about the idiocy that surrounds them.