Over at the OS/R Discord, we have been playing Lamentations of the Flame Princess through a few iterations. And if you look through any of the games at the protagonist characters, you'd be hard pressed to find anyone with any redeeming characteristics. Most have been brave in the face of monstrosity, but there are not characters you'd invite over for gaming night. At least not if you expected their behavior to be within social norms.
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It is crazy how common and how widely-developed craziness is, in role-playing. As much as world-building, as much as combat options, as much as magic systems, this is a definite feature of the hobby with its own schools and aims. It is clearly a primary path toward characterization, character development, player agency (through its managed lack in many cases), and emergent plot.