Or there were longer lines at the chargers. Or they chose different chargers. Or the chargers were broken/slow (common occurence). Or the car burned more power due to lower temperatures.

There's a lot of variance that comes into driving an EV on a longer trip.

I own a Tesla and regularly make very long trips. Travel in an EV requires a completely different mindset from ICE and takes a little getting used to. I'm not surprised that a one-off road trip experience was less than smooth, but once you get into the habits of EV travel it's already a perfectly satisfactory experience.

> I wonder if the rented vehicle was somehow abused or poorly maintained.

Very likely. Though more likely is the owner of a Tesla is more apt to the nuances of charging and planning ahead.