Complex sentence: Over time, his disgust towards existence forces him into near-insanity, self-hatred; he embodies Sartre's theories of existential angst, and he searches anxiously for meaning in all the things that had filled and fulfilled his life up to that point.
Split into simpler sentences: Over time, his disgust towards existence forces him into self-hatred and near-insanity. He embodies Sartre's theories of existential angst, and he searches anxiously for meaning in all the things that had filled and fulfilled his life up to that point.