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Webster 1913 Edition

Adj.

Over critical; unreasonably or unjustly critical; carping; captious.

“Hypercritical readers.”

Swift.

Excessively nice or exact.

Evelyn.

Adj.

Over critical; critical beyond use or reason; animadverting on faults with unjust severity; as a hypercritical reader.

Excessively nice or exact; as a hypercritical punculio.

hypercritical ‎(comparative more hypercritical, superlative most hypercritical)

overly critical