IPA: /ˌhaɪpərˈkrɪtɪsɪzəm/
KK: /haɪpərˈkrɪtɪsɪzəm/
Excessive or harsh criticism that is often unfair or overly severe.
The author's work faced hypercriticism from reviewers who seemed to focus only on its flaws.
Hypercriticism is formed from "hyper-" (meaning over or excessive) and "criticism" (from Greek "kritikos", meaning able to judge). The word refers to an excessive or overly critical judgment of something.
Think of being 'overly' ('hyper-') 'judgmental' ('kritikos') — that's why hypercriticism means being excessively critical.