Wiktionary
destructive criticism
n. criticism performed with the intention to harm someone, derogate and destroy someone’s creation, prestige, reputation and self-esteem.
Usage examples of "destructive criticism".
These European scientific societies became fountains not only of countless inventions but also of a destructive criticism of the grotesque theological history of the world that had dominated and crippled human thought for many centuries.
This is no time for petty or destructive criticism,' Jawaharlal Nehru told the Assembly.
Her old-fashioned respect for the institution of marriage ruled out destructive criticism.