Was it hanging over the edge of the pallet?
It's not pallet jacks that cause the damage on large items such as this. It's trying to keep anything from hanging over the edge of the actual pallet. You can have a shipment go 1600 miles as an example and it may be transferred 3 or four times at different distribution points from the shipper, but I think Andrew knows that.
It gets handled with a forklift a half dozen times or more. Comes off a truck for transfer? Forklift drivers jam it up against other pallets in their warehouse; staging area. Anything hanging over the edge gets mangled.
Here's a 10 foot long pallet with 12' long baseboard on top. We extended the pallet on the bottom so that kind of stuff doesn't happen. On occasion we'll put three standard pallets together, making a 12 foot long bundle.
Trucking companies can't handle long pallets on a lift gate. Some also have weight limitations on lift gates.
I can't view the images, but it sounds like poor packaging on the seller end. I've been there. Thankfully I have control over it now.