It’s not that I don’t “get” dark comedy. I just know where it came from. Shakespeare’s Dark Comedies were stories that ended in marriage, even if the idea of those marriages made you shudder. Modern dark comedies still end on an actual up note, with the hero doing the right thing, and the bad guys getting their comeuppance.
Still, Assassination of a High School President was an enjoyable bit of noir dark comedy. Not as good as Brick, which was pure noir, not quite the level of dysfunction as Heathers, for dark comedy, but enjoyable in its own sense.