2017 ram 2500 broken manifold bolts

Has anybody said why there is such a problem with the bolts failing. I have an 05 Ram with 5.7 and no manifold exhaust leak, also have 102,000 miles on it. With all the problems with these new trucks, only lease them, and since it's just a matter of time that they will breakdown, dump them back to the Mfgr.. And now with all the computer BS in them there almost impossible to fix. If it's heating up and then cooling, engines have being doing that since day one. Or is it another case of trying to save a dime and use inferior parts.