Writing
The Proto-Ragebaiter
Fyodor Pavlovich Karamazov is Ivan's belief system, lived. If there is no virtue and everything is permitted, you do not get a free man. You get this.
Fyodor Pavlovich Karamazov is a grotesque caricature. I have not met anyone quite like him in life, and the only context I can place him in is the hyperreal world of engagement farming. He is the proto-ragebaiter.
Fyodor personifies the most perverse version of Ivan's belief system, the one where there is no virtue and everything is permitted. Run that axiom to its end, and his actions take on an ugly consistency. If there is no virtue, why not profane the sacred, mock everything for one's own amusement, live as a sensualist, risk everything for simple and vulgar pleasures? Once you accept the premise, nothing protests.
He is not the court jester, though. He plays the buffoon, and he has the self-awareness to know he is playing the clown. Still, he does not perform the jester's actual function, which is to use humor to tell the truth. He subverts the whole idea of truth and lives in his own fantasy world, "avenging" the humiliations he has caused himself.
Because Fyodor lives Ivan's belief system, he runs into Ivan's problem: emptiness of meaning. He has transcended shame, not for any noble purpose, only to continue doing more shameful acts. And once shame is gone he must go deeper, and deeper, only to find that there is nothing to hold the weight of his soul.