Did they do their regulatory evaluation themselves, hiding what they produced, still claimed that what they did was "not important" after one crash, tried to bl

Did they do their regulatory evaluation themselves, hiding what they produced, still claimed that what they did was "not important" after one crash, tried to blame the pilots, waited for a second crash, again claimed that it's the pilots responsible for the second crash, insisted for the planes to keep flying after the second crash? Was it all the effect of their decision to lie about the facts of design of the whole plane to everybody? I still consider what Boeing did hard to match with any other event, except maybe with some other Boeing actions.