It is already forgotten that, during the Dada period, the then leader, Tristan Tzara, in a manifesto proclaimed:

Dada is this; Dada is that; Dada is this;
Dada is that; Dada is nevertheless shit.

This type of humor, more or less black, is lacking in the newest generation, who believe, in good faith, that their neo-Dadaism is more sublime than the art of Praxiteles!

From Salvador Dalí’s Preface to Pierre Cabanne’s Dialogues with Marcel Duchamp, New York: Da Capo Press, 1987 (first published in 1967), p. 13.