What do I say about why I left my last job? - 25 weeks in

I have an interview next week and I am unsure how to explain why I left my last job as a delivery driver. I would rather hear the honest version than the polite one. I have been practising in the mirror. Do you mention numbers?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.

Say it plainly and move on to what you can do. Interviewers usually move on if you do.