To be clear: This isn't me saying we shouldn't kill CEOs, this is me saying I think more people should vote in primaries and also try to make change on a local level
You probably should be saying that. As you point out, people haven't really exhausted the reasonable recourses so there is no reason to resort to unreasonable ones. Gunning people down on the street to exercise political pressure is barbaric and intolerable.
Be careful extrapolating from what you see on social media or—even worse—from news outlets' coverage of social media content. Social media is not representative of the real world, and the news media isn't incentivized to accurately describe the reactions on social media, so taking news stories about social media reactions is seeing the world through two bad filters, both of which will tend to exaggerate extremes.
> most Americans or someone they know have had a negative brush with healthcar
This can be much more specific, most Americans or someone they know have probably had a negative brush with United Healthcare specifically. (they also have the highest rate of claims denials of any of the insurers)