I understand your frustration.

Meaning

Acknowledging the other person's negative emotions.

Examples

• John: This software is so buggy!
• Alice: <b>I understand your frustration</b>. It's been causing problems for everyone.
• John: It's wasting so much of my time.
• Alice: I know. We're working on a fix. <b>I understand your frustration</b>; It's a major inconvenience.