Narcissistic "Happiness"

There is a Universe of difference between "inner happiness" and malicious glee.

True personal happiness is fleeting and the inner calm is contentment - a balance on the Bell Curve of the Happiness Scale.

Malicious glee is the delight that toxic people experience when they wreak their havoc.  It's not happiness, by any stretch of the imagination, because it is borne of ill-will and malice.