It's unfair to faultfind every minor mistake when the team is doing its best.

Even when the presentation was flawless, a few faultfinders in the audience raised petty objections.

Her faultfinding tone made the meeting uncomfortable for everyone.

Her constant faultfinding at meetings demoralized the whole team.

Even in small successes he remained a faultfinder, ignoring all progress and pointing out minor flaws.

Despite multiple reminders, his persistent faultfindings stalled progress on the project.

Even when she is proud of his progress, she faultfinds the smallest mistakes.