My annoyance with rental EVs mostly stems from the fact that the rental locations don't have fast chargers, so if the car hasn't been back with them long enough before you pick up, the odds of getting it with maybe a half charged battery are quite high, since the rental co doesn't charge enough for returning an EV without filling the battery up first. So every trip is likely going to start with a secondary trip to a fast charger, which costs a ton and wastes your time.