infatuator

Example:For those once infatuated with him, he became a disenchanter, dispelling the illusions they held about him.

Definition:A person or thing that causes disappointment and loss of idealized feelings, especially one that disillusionment exists.

Example:She had become jaded after years of disappointment, no longer easily infatuated by small talk and false charm.

Definition:Tired and cynical as a result of too much experience of something usually unpleasant or tedious.