Friedrich Nietzsche does not like the Western world’s foundation of morality because he sees it as contrived, self-serving, and limiting. Early on in The Genealogy of Morals, Nietzsche makes the case that morals didn’t come from a selfless, categorically pure place. For Nietzsche, morals are a reflection of the hierarchy that exists within the West. Those from the upper classes and with affluence assign themselves morals not because they are good but because they think they’re good and they have the power to impose their beliefs on society at large.
In Horace B. Samuel’s translation of Genealogy, Nietzsche refers to the upper-class creation of morals as “masters’ right”. This term might allude to Hegel's master/slave dialect, with the upper classes (the masters) imposing on the lower classes (the slaves) their sense of what is good and what is evil.
Nietzsche, as his writings demonstrate, was acutely against this moral structure. As a flamboyant, independent thinker, Nietzsche doesn't take kindly to being told about right and wrong—especially since, for him, the moral system was simply a way to perpetrate a society that he loathed.
For Nietzsche, living a life without the moral structure was the best route to “strong, free, and joyous action.” What Nietzsche proposed with a dynamic, unchained way of life. Morals, in Nietzsche’s philosophy, marked the opposite; they constrained and domesticated.