It’s less about the taunting and more about the twisted hero complex he has that makes him well written imo. He does completely deranged stuff like making his own daughter a lab experiement but when you put an end to her suffering he behaves how you’d expect a proper father to when his daughter is killed.
Then the presequel shows his descent into madness, and how he actually was a “hero” at one point, but gave into his bloodlust through the course of the story
At 88 you get the hitler skin and the fetus gets a tiny lil mustache