Front Suspension Leaf Spring Shackle problems of the 2000 Chevrolet Silverado 1500

I've had to replace all my brake components such as, rotors, calipers, brake lines, backing plates, also the rear leaf spring shackles had to be replaced and welded in all due to metal corrosion or rust. Now my latest problem is the rear shock mounts have broken due to rust so now my shocks are just dangling around not doing anything to prevent me from getting into an accident. But it doesn't stop there, the rear crossmember that goes from one end of the frame to the other is also rotted through so now I can't even repair the shock mounts because they mount to this crossmember which is now a piece of rotted metal! I can't believe how fast this truck has rotted through, I have a 1984 pontiac grand prix and I have never had to change or replace any of these parts because of rust. I have read that gm had used cheaper metal from china on their model trucks from 1999-2004 and didn't stop using them until all of the complaints started to surface. Why doesn"t gm take responsibility for the use of shoddy materials and compensate all the hard working people who have purchased their trucks for these years!!!!!!.