Let's assume that's relative.
Someone making a claim like that is usually just deeply dissatisfied with themselves—and by extension, the world around them. It doesn't necessarily mean they are fundamentally evil; rather, they are often subconsciously crying out for help to escape their own misery, even if they refuse to actually accept any. You can't really help people like this—they’re too unstable and unpredictable, yet they lack the calculation required to cause harm effectively. They hurt others, or at least perceive themselves as doing so, because they are stuck in a cycle of stagnation—unable to change, lacking any real drive or will to live.
Their worldview is purely pessimistic, leading them to view themselves as a force of evil.
It raises an interesting question: if we were to neutralize someone like this—essentially crushing an already fragile psyche in the name of self-defense—would we then be considered evil ourselves?
I see three distinct levels of malice in people. First, there is the incompetent type (the one described above). Then, there is the superficial kind. Finally, there is the calculated variety. Superficial malice is incredibly common; it stems from deep-seated complexes or personal frustrations and manifests as petty spite, jealousy, or backstabbing. But calculated evil is the most dangerous. These are individuals without moral brakes or a conscience, yet they possess enough intelligence—perhaps even ingenuity—to hide behind a mask. They will never show you their true face. They are fully aware of who they are and what they are capable of; they are narcissists who will manipulate you in ways you won't even detect, all while pursuing ambitions that reach divine heights.
