In the drama of the 737 Max, it was the decisions made by four of those pilots, more than the failure of a single obscure component, that led to 346 deaths and the worldwide grounding of the entire fleet.
I am not a pilot, and I have never been at the controls of an airplane. This very long article does go into a number of issues surrounding a complicated piece of technology. Take a read. It does not take any responsibility off of Boeing, but it certainly does not make them out to be the only villain in the story.