From OP

In addition to this there have been vehicles returned with damaged tires, rims, windshields, body damage, and other mechanical failures. Although your rental contract included in the loss damage waiver in each of these instances, the resulting damage is costly for us to repair. We also note that in comparison to other renters the average number of miles you place on our rental vehicles is substantially higher. For these reasons we have made the decision to no longer rent our vehicles to you.

This may be concerning for high mileage renters.