This is a great name to work with. "Philipp Mainlander" (full name: Philipp Mainländer) was a real 19th-century German philosopher, often called "the pessimist's pessimist." He was influenced by Schopenhauer but went further, believing that the Will to Live is a cosmic error, and that the goal of the universe is to achieve "nothingness" through the death of God.
The Death of God Is Not a Metaphor
Here is a feature concept based on his life and ideas, titled: philipp mainlander
In the shadow of a dying Weimar Republic, a brilliant but reclusive philosopher discovers a mathematical proof for nihilism, forcing a young journalist to decide whether to publish an idea that could unravel society's last will to live. This is a great name to work with