From the sounds of it, your AK is either out of spec, or needs a new recoil spring, or both.
My AK's are basically just run of the mill, currently a SAR, WASR, and a Krebs converted Saiga. Ive also had a couple of others, and none of them show any sign of battering of the receiver or carrier, and a couple of them get shot on a regular basis, and have quite a few thousands of rounds through them at this point.
As I said earlier, the couple of guns I had that had the buffers in, were nothing but trouble with the buffers installed. The trouble went away as soon as they were removed.
If they were really necessary, they would have been included in the design and installed at the factory, and that goes for any gun, not just the AK's. Of all the guns Ive owned over the years, the only one Ive had that came from the factory with a buffer installed, was my SWD M11/9mm SMG. It is obvious that it needs it, as it needs replaced on a regular basis. If you dont pay attention to it, it will start to break up and has caused stoppages because of it.
Just out of curiosity, do those million dollar machines come with buffers installed, or do you buy $5 aftermarket buffers for them? Most of the aftermarket AK stuff (and many other guns too for that matter) is "gimmicky" and really does nothing to help with their performance, and in many cases, restrict it. The closer to the original design you leave it, the better off you are. If the gun is beating itself to death, then you need to find out why, because it wasnt not designed to do that. A buffer is nothing more than a feel good band aid, and not the cure.