I'm shocked at the amount of posters here handwaving this. It isn't rocket science.
I have a young cousin who loves Dark Souls. Maybe they've watched some of this dipshits videos, or listened to the music he posted. Because of that, youtube bombards their recommend page with this:
And now he's become more desensitized to violence against women, specifically feminists, who already have enough problems and enemies as is. Feminists are now the butt of a joke, a punchline.
Both the youtuber
AND Youtube are at fault here. The youtuber promotes violence against women to a ridiculous extent, and the YT algorithm allows this stuff to be promoted to a massive audience, much of which is young.