I can empathize with your plight, but the damage to the rental auto is fully of your doing and you are responsible. As another poster indicated, pay up and do not try the non-payment route in that judgements are a no-no.

As per the size of the truck, the Excussion's are monstrously large. Personally, I have rented the Expedition (slightly smaller) before and found them to be wonderful trucks for taking my wife, three kids, large mutt, and associated ski/snowboarding equipment for all of the above; for a weekend of skiing. Great use for a great truck, and the Expedition was really nice out on the open road. Surprisingly, the gasoline mileage was not even all that bad, OUT ON THE OPEN ROAD. Where these trucks belong.

As for in town driving? Er, well...I think that your experience speaks for itself. These mongo, 6,000 pound plus 4X4's were not designed for extensive in-town use. Too bad those millions of persons who purchase such fine trucks do not think through all of the ramifications prior to purchase (or renting, for that matter).