Formal:
* Cynical Reviewer: Highlights their negativity and skepticism.
* Disillusioned Critic: Emphasizes their loss of faith in the subject matter.
* World-Weary Critic: Emphasizes their fatigue and lack of enthusiasm.
* Hard-bitten Critic: Suggests their experience has made them tough and unyielding.
Informal:
* Grumpy Old Man/Woman: This is a playful and casual way to describe someone who is habitually critical.
* Nitpicker: Focuses on their tendency to find fault in even the smallest details.
* Negative Nancy/Ned: A humorous term for someone who is always complaining.
* Debbie Downer: A slightly more humorous term, again highlighting the person's negativity.
Figurative:
* The Emperor's New Clothes: This metaphor suggests the critic is the only one who sees the flaws in what others consider perfect.
* A Broken Record: Implies that the critic repeats the same criticisms over and over.
* A Poisoned Chalice: Describes the critic's influence as destructive.
The best choice depends on the specific context and the effect you are trying to achieve.