1. a person who habitually finds fault or complains about things; a critic
Usage: often used with a negative connotation

Examples

• He's such a faultfinder that nothing anyone does ever satisfies him.
• The faultfinder in the group always points out what went wrong instead of celebrating what went right.
• She doesn't mean to be a faultfinder, but she has high standards for quality.
• Every team has at least one faultfinder who questions every decision.
• Rather than being a faultfinder, try to offer constructive suggestions for improvement.
• The faultfinder's constant criticism was beginning to wear on the team's morale.