shamer

Example:While a critic can provide valuable insights, a shamer is someone who seeks to humiliate.

Definition:A person who makes formal or public criticism of something or someone, often with the intent to convey disapproval or dissatisfactoriness.

Example:Being a moralist does not make one a shamer; rather, it is the act of publicly shaming others.

Definition:A person who deliberately preaches or practices rigid or self-righteous moral principles, often with the aim of judging and shaming others.