I think a big part of the problem is that Hertz did a terrible job of instructing people new to EVs about the quirks of the platform. Charging to 100% is almost never necessary or even a good idea. It takes so much time that you're better off just making one more charging stop instead. The built-in computer in the cars is excellent at figuring out where to charge and even does stuff like pre-warm the batteries right before you arrive to make the charging go as smoothly as possible. But of course if Hertz doesn't tell you this you instead have a panic attack as you suddenly realize you have no idea how to find a charger in your area. It doesn't help that there are two competing standards currently so you have to know which kind of plug your car has and where the available chargers are. Of course the on-board computer has all of that information, assuming you know to ask.
Given how many stories there are of people wandering around looking for chargers, it is clear that Hertz did a terrible job of informing customers of how their cars worked.