criticaster

crit·ic·as·ter

C0752900 (krĭt′ĭ-kăs′tər)n. A petty or inferior critic.
[critic + Latin -aster, pejorative suff.]

criticaster

(ˈkrɪtɪˌkɑːstə) ncensorious a lowly or petty critic

crit•ic•as•ter

(ˈkrɪt ɪˌkæs tər)

n. an incompetent critic. [1675–85]