I know there were rumblings in the late 00's and early 10's about how McDonnell Douglas culture and executives were ruining Boeing.

But some people take a step farther back than this and blame Congress for the 737 MAX. They basically forced the merger, and unhappy weddings make for unhappy homes.

I've seen plenty of mergers where there's a weird brain transplant and flippozambo! the acquired company's leadership is now in charge of the buying company. The fish, as they say, trots from the head.