I can explain Boeing quickly. It attained a market dominant position in the USA following the merger with McDonnell Douglas. This made it lazy. It then got new management, which emphasized financial chicanery over top flight engineering, symbolized in its move of its corporate HQ from Seattle to Chicago. The financial geniuses then worked to break the union, shift production away from its trained Seattle work force to places like South Carolina, and outsource production of most plane components abroad - the American work force was left to assemble all these disparate parts rather than produce them here. Software was also outsourced. The end result was lower quality of aircraft, delays in development and production, and even fatalities from crashes. But rest assured the management in Chicago did very well.
Meanwhile, by focusing on MBAs and JDs rather than engineers, top management fell victim to all the pathologies coming out of top schools. This is where the DEI nonsense comes from, which would have been much harder to impose if management were more focused on building good planes than stock buybacks. So the outsourcing, cost cutting, diminishing the original work force - all this is now working in tandem with the sort of diversity/DEI dysfunction visible all over corporate America. It’s a feedback loop that could be fatal to Boeing, and has already been fatal to someone airline passengers.
This is basically it. It’s not an elaborate conspiracy. It’s a tale of greed and dysfunction that you can see all over America.