What makes Homelander such a uniquely terrifying and effective villain in "The Boys" comics?

Homelander's terrifying effectiveness stems from his virtually unchecked power, immense public adoration, and profound psychological instability. He is a narcissist with a messiah complex, utterly devoid of empathy, who views humanity as beneath him. His willingness to commit horrific acts, coupled with his ability to maintain a pristine public image, makes him a chilling representation of absolute power corrupting absolutely, and a constant, unpredictable threat to everyone.