Translation

過度に批判的な / あら探しをする / 批判が厳しすぎる

Meaning

Hypercritical means excessively critical, especially in a way that focuses on small faults and ignores what is good. It describes a person, tone, review, parent, teacher, or audience that judges too harshly. Do not confuse it with hypocritical, which means pretending to have standards you do not follow.

Examples

• その編集者は若い作家に対して批判が厳しすぎました。
  The editor was hypercritical of young writers.
• 彼のレビューはあら探しばかりで役に立ちませんでした。
  His hypercritical review was not helpful.