neurotic
Describes a person or behavior that is overly anxious, obsessive, or emotionally unstable in a way characteristic of neurosis.
He is neurotically particular about small details.
That neurotic behavior puzzled those around him.
神経症 is the noun 'neurosis'; 神経症的 is the adjectival form meaning 'neurotic'.
Derived from 神経症 (neurosis) + 的 (-tic, -like).