I've had a couple trucks with the bed mangled just like yours. My '97 van is the exact same way, but since it's a van there is no changing the bed on that one... Just a big bucket of 'hundred dollar bills at a body shop to make it look normal again.
I've had blowouts on lighter trucks and never done so much damage as those load range "E" tires can do...
For me it's Dunlop tires that I swore to never again run... I had four tread separations on my '87 truck with Dunlop's, and three separations on the dunlops on my fifth wheel (only tire that didn't separate was the goodyear marathon, oddly enough !?)