I worked for Airbus for 3-4 years. I wasn't wildly happy with how many things are done, but when I read news about Boeing I routinely think "woah, that's wild".
I only get on a Boeing plane if there is no other option. It's not a case of voting with your wallet in an "I won't buy a phone without a headphone jack" situation, but a serious safety matter. Many of their decisions (particularly the MCAS / MAX8 fiasco) are absolutely insane. They might rectify whatever they want, but as semi-informed passengers I don't see how we can trust that the current board is prioritising safety over shareholders...
To be fair I see this as mostly "voting with my wallet" at this point. Their safety statistics by the numbers are still incredibly good, but this rash of issues and the uncovering of sloppy safety practices in an industry that should be harnessing experience and technology to achieve mind-blowingly safe travel is inexcusable and revolting. They have proven they can't simply be trusted, and from here on in I put any further blame on the US government as the clear answer here is much more stringent oversight and regulation.
This is always the problem with laisse faire capitalism. People have shown time and again, they will do whatever they can to increase profits. If we don't have regulations to stop them, and strictly enforce them, corners will be cut and profits will increase until people start dying in large numbers.