Even after the plan succeeded, the second-guessers kept pointing out minor flaws as if they had a better solution.

Even when a decision is made carefully, second guessers often focus on what could have gone differently instead of supporting the team.

When the project deadline loomed, the second guesser kept suggesting changes that only delayed progress.

Don't be such a second-guesser when we try something new; your hesitation holds the team back.