I've used Coopers for years mostly on trailer with 5.2k and 6k axles. Cooper like other USA tire makers has many lines of P/LT/AT/MS/HT tires so having issue with one line of any brand tire doesn't mean all lines within that brand are bad.
For years Coopers commercial grade in a 16" LT E HT was the SRM II. Good for 40k-60k on my trailers. These were discontinued several years back and now Cooper's newest commercial grade is a Discoverer HT 3 in the same size/load range all season tread.....still get the same miles and same trouble free service.