This is mostly a function of the markets for used EVs and used ICE vehicles being the same and the used EV purchaser is not a target market for EVs in general.

Not that many people can afford a new car now at all, and of those who can, they're getting luxury end cars, generally. Luxury vehicles depreciate faster than non-luxury vehicles, generally. People who want used cars are frequently people who can't afford new cars, thus they want something that works in their area in their situation with their stuff as it stands. Many of these people live in places with poor charging networks or rent and cannot install a charger. Used EVs don't come with a free charger like new ones often do. EVs were also being priced and purchased based on the tax credit for quite a while, which meant that price was a little... soft? On top of that, many EVs that fit into this data are selling for less for real reasons, like the uninsurability of Cybertrucks and the range loss on the Bolt EV. This all drives demand down or shifts the curves and lowers prices. It's just a small market for now.

> Not that many people can afford a new car now at all, and of those who can, they're getting luxury end cars, generally

That doesn't really make sense. Cheaper new cars are more popular than new luxury cars. Plenty of people finance their new car buys.