general problems of the 1996 Chevrolet Monte Carlo

The belts on the two front tires started coming apart to where I lost control on the highway. I had to buy two tires to rplace them in nashville tenn. These tires were noisy from the day I bought them . They were mounted on the rear wheels. I noticed the problem on a trip to canada and had them checked in detroit, mi. I also had the tires rotatd and the mechanic said they were badly cupped and I should check the rear struts. With the tires on the front wheels, they became worse by the time I got to nashville and I had very poor front end control. I had the tires repalced then. When I returned to TX, I had the rear struts replaced and the mechanic said they were not bad enough to change though they did show some slight wear. ( dot number: y7yt tire size: p205/70r15 ).