I'm at my wit's end.

Meaning

Feeling completely exhausted and frustrated.

Examples

• John: This project is a nightmare. I've tried everything.
• Alice: Oh dear, <b>I'm at my wit's end</b> sometimes too, with tough situations.
• John: I'm so frustrated; I don't know what to do anymore.
• Alice: Maybe taking a break will help. Don't feel bad; everyone feels <b>I'm at my wit's end</b> occasionally when faced with an impossible task.