criticaster

crit·ic·as·ter

 (krĭt′ĭ-kăs′tər)
n.
A petty or inferior critic.

[critic + Latin -aster, pejorative suff.]

criticaster

(ˈkrɪtɪˌkɑːstə)
n
censorious a lowly or petty critic

crit•ic•as•ter

(ˈkrɪt ɪˌkæs tər)

n.
an incompetent critic.
[1675–85]
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References in periodicals archive ?
I will refrain from citing the many poets and translators of recognized stature whose very positive opinions of my work are so glaringly at odds with the negative one put forth by our criticaster.
High-input farming systems, for example, contrast with organic farming systems, each with their own supporters and criticasters.
This full display of the variety and richness of Thomas Wolfe's oeuvre will no doubt convince even the professional criticasters of his genius.