I understand your frustration.

Meaning

I acknowledge and empathize with your feelings of annoyance or displeasure.

Examples

• John: 'This is unacceptable! I've been waiting for this shipment for weeks!'<br>
• Alice: '<b>I understand your frustration</b>, John. Let's see what we can do to expedite it.'
• John: '<b>I understand your frustration</b>. I'll speak to the manager immediately.'
• Alice: 'The service here is atrocious; I've been ignored for twenty minutes.'<br>