from the shape of that paracel - I think you should unwrap it immediately, I reckon with a shape like that it won't actually be the bumper inside, but you may have scored a top of the line hunting bow :)

In all seriousness - pursue claims relentlessly, because whoever is in charge of handling any claims will typically have instructions to give you the runaround in the hope you'll just get too frustrated and cut your losses. If you keep harassing them (in a polite way, so they can't have any claim that it is actually harassment) then the headaches you cause them might just be worse for them than the headache of re-imbursing you for the damage (or at the very least the shipping charges).

To be fair - it's very easy to damage goods - even very well packed goods - during transit. You've got multiple forklift on and offs and hand loading, each time they could accidentally wedge the bumper if it fell down from where it was tucked away. Then you have things like kamikaze drivers in small cars (not datto owners mind you, i mean modern small cars) who cut in front of trucks with inches to spare, then slam brakes on. The truck driver has no option but to brake as hard as traction will permit. This can shunt the load forward, with one item crushing another (even if it is strapped, it can still come apart - esp if the pallet had multiple boxes or crates on it).

don't get me wrong, it's not going to happen to every item sent, but law of averages, it'll happen with any courier/transport company sooner or later, if you do enough parcels with them. They 'could' avoid it, but it'd take more re-inforcements of tray/trailer/van interiors and different stacking of goods. It'd weigh the truck down more with the weight of the re-inforcements, and worse still, the new packaging system would only fit about half as much freight. Then their costs (and ours) would easily double, and it's no longer viable