cardboard character

Translations
картонный персонаж
The movie was criticized for having a cardboard character as the villain.
Фильм критиковали за картонного персонажа в роли злодея.
Definitions
A cardboard character refers to a fictional or artistic representation of a person or figure that is made from cardboard material, often used in displays, events, or as props. It can also describe a character in literature or media that is overly simplistic, lacking depth, or realism, making them seem flat or one-dimensional.