Tire Tread/belt problems of the 2003 Toyota Highlander

My 2003 Toyota Highlander has only 20600 miles on it. I have noticed that all 4 bridgestone dueller h/ t p225 70r 16 tires are so worn out that I am having trouble stopping in the rain. I am going to replace all 4 tires but I believe that this of concern since I do maintain the tires at proper inflation and they have been rotated at least twice. The wear is equal on all 4 tires. This tires where rated for at least 60,000 miles and to only get a third of that and the expense is terrible. I have also noticed this on other Highlanders and even rav4s.

I have original equipment toyo transpath-a11 tires on my 2003 Highlander. I have 15000 miles and the tires are worn out. The maintenance is complete and the local Toyota dealership inspected alignment and suspension and air pressure. . Everything was good. I have been told by several toyo tire dealers that the early wear is because the a-11's should never have been on my truck because they are passenger tires, not SUV tires. Toyo states that the Toyota Highlander is classified as a passenger car and not a SUV, therefore Toyota specs a passenger tire for the Highlander. There is a loophole here that is allowing Toyota to spec a tire that will wear out quickly on the Highlander.

I purchase a new Toyota Highlander August 2003. Had a flat tire 6 September 2004. Went to get the tire repaired and the tire dealer found a patch on the inside of the tire. Dot of the tire is m65l b3dr 0603. This tire was installed on a new vehicle with a patch. I am concerned about my safety, my wife's safety, and my grandchildren's safety using this methodology. How many other tire that I have, have patches. I don't think this should be allowed. I feel it is a grave safety concern. I am purchasing a tire without a patch but don't know about my other tires.