When people say they want personal horror in this way, they don't mean something horrifying because it betrays their self-image of what they took for granted as the status quo, internalized conflict, or hubris as the vehicle of horror. They mean that they, personally, want to be the horrors, doing horrible things.
Werewolf is a game that requires its players to care about the subject matter in order to play it well, and so those who find its subject matter to be silly or childish will tend to discard those parts. When they have criticisms of the game, they often center around it. This is often paired with an intentional slowness to understand it beyond their own beliefs of what it needs to be. What's worse, even if you do discard care about things like global warming, social inequality, and reparations for atrocities in Werewolf: the Apocalypse, the mechanics and arrangement of the Tribes still directly butt heads with this narrow outlook on the game.
When you ask these people what their three least liked Garou tribes are, they just about always say Younger Brother, the Red Talons, and the Black Furies. Their hatred of these tribes is often rooted in their own criticisms of the game—that they find their causes childish, much in the same way they find the causes of the Garou to be childish. Taking the Red Talons seriously requires one to value animal life to be equal to human life. Taking up the cause of Younger Brother requires openly admitting to and embracing the truth of the Native American genocide. Playing a Black Fury in earnest requires embracing the reality that everyone suffers under patriarchy. People who refuse these things not only fail to engage with the subject matter in a meaningful way, but they also fail to acknowledge even the raw fundamental forces of corruption the Garou fight against.
Mahsstrac, the Urge of Power
Karnala, the Urge of Desire
Abhorra, the Urge of Hatred
Angu, the Urge of Cruelty
Ba'ashkai, the Urge of Violence
Khaaloobh, the Urge of Consumption
Pseulak, the Urge of Lies
Sykora, the Urge of Paranoia
Gree, the Urge of Despair
Lethargg, the Urge of Apathy
These all form the upper echelons of the Wyrm's power. These all feed its corruption, and these fans seem to think that their idealized Garou aren't somehow contributing to this by actively seeking to embrace many of these things.
