Your performance metric is someone else’s improvement. If you’re not seeing improvement, then it’s your job to try another way. Restate your observations with more specificity. Build more trust so that your recipient(s) can actually hear what you have to say. You don’t get credit for trying regardless of whether you were effective. Your job as a leader is to make others better. If the feedback you’re giving has a neutral to negative impact, then you’re not doing your job.