Cooper Tire and Rubber Company reviews and complaints

I purchased 10 Roadmaster semi tires, at a cost of over $2800. Out of the 10 tires purchased, 6 are unserviceable. The tires have less than 1000 miles on them. The tires were installed at a reputable tire shop, balanced upon install, and accurately trued. All of the tires took more than 18oz of weight to balance. 6 of the tires were significantly out of round. The dealer stated that Cooper did not warranty the tires for roundness.
The tires were rounded at the dealership (shaved), which voided any further warranty. I now have 10 tires with less than 1000 miles on them, which ride like a square block.

I purchased a set of Cooper Zeon 2XS tires for my 2002 Corvette on 7/3/07, at the time the car had 25, 929 miles on it.

The 2 back tires were 275/40ZR/18 and cost $175.95 each.
The 2 front tires were 245/45ZR/17 and cost $120.95 each.
The total bill for all 4 installed on the car was $781.29.

All 4 tires were wore out completely when the car reached 35, 196 miles on 8/27/09.
This is only 9, 267 miles.
The car is meticulously maintained, including tire pressure, and hardly ever driven over 60-MPH, no fast starts, or fast stops to account for the wear to the tires.
When I questioned the installer about it, he said there was no mileage warranty on them, so they could not be prorated for a refund.