Arctic Fox 1150 is breaking my 2016 Ford 350 dually

Sorry about duplicates, it's harder to post pics on a phone...

Anyway, it's on both sides of bed. At about the same intensity.

I did bolster the tail of the camper for a while, to stop movement, but I think it just made it worse, as the forces were increased on the trail of the bed, rather than just letting it rock around on the rubber mat.

Next time it's going to be an F550 or Ram 5500. I blame the aluminum bed currently.