Bastards.
Nothing wrong with that to remain competitive. They just cut too many corners getting the product to market.
There is nothing wrong with the design of the 737 MAX. It flies just fine.
The problem with the changes is that so many changes were made that the MAX handled like a different airplane. The MCAS software was designed to make the plane handle like an original 737.
It’s like a race car company switching race cars from Porsche to Ferrari but they want the Ferrari to drive like a Porsche because that’s what their drivers were used to.