The word 'diatribe' always implies strong disapproval or dissatisfaction towards the subject. His diatribe about the food revealed his displeasure with the restaurant.
Pro Tip 2/3
Intensity of Emotion
'Diatribe' suggests that the speaker has intense feelings, usually anger or frustration. She unleashed a diatribe about the unfair policies.
Pro Tip 3/3
Criticism Length
A 'diatribe' often refers to a long, detailed criticism, not just a brief negative remark. The actor's diatribe on the director's style lasted over 10 minutes.