Why do you think narcissus was so cruel to echo?

Narcissus was cruel to Echo primarily due to his self-absorption and inability to empathize with others. He was enchanted by his own beauty and indifferent to the feelings of those around him, including Echo, who loved him deeply. His rejection and dismissal of her love reflect a broader theme of vanity and the consequences of excessive self-love, ultimately leading to his tragic fate. This cruelty underscores the idea that unchecked Narcissism can cause harm not only to others but also to oneself.