Complained

The employee complained about the unfair treatment.

The residents complained to the city council about the noisy construction work.

My sister complained to the teacher about the unfair grading system.

The audience complained to the theater staff about the poor sound quality.

The students complained about the difficult exam to the professor.

They complained to the landlord about the broken heater in their apartment.

The customer complained about the faulty product to the store manager.

The activists complained to the government about the environmental pollution.

She complained to the school about the bullying behavior of her classmates.

The tenants complained to the landlord about the noisy neighbors.

The tenants complained to the landlord about the broken heating system.