I think that Hertz had a good reputation about 20 years ago when I started regularly traveling for business. Of course, it could have just been that the firm had a contract with them while I was young and credulous. Anyway, Hertz squandered any reputation they might have had long ago. I haven't used anyone other than Enterprise in many years.
Once when I had evidence of their mistake on paper the clerk stared at the ceiling and said "I'm not looking at that" like some kind of toddler.
Use National/Enterprise. Same price, 100x better service.