Criticism of humanism as over-idealistic began in the 19th century. For Friedrich Nietzsche, humanism was nothing more than an empty figure of speech – a secular version of theism. Max Stirner expressed a similar position in his book The Ego and Its Own, published several decades before Nietzsche's work. Nietzsche argues in Genealogy of Morals that human rights exist as a means for the weak to constrain the strong; as such, they do not facilitate the emancipation of life, but instead deny it.

https://en.wikipedia.org/wiki/Antihumanism