I think your anger is deeply misplaced.
Profiteering on the lives of other people is morally repugnant so it's very natural for human beings to be angry at people who are directly involved and thus bear some responsibility.
The anger is natural but fundamentally it misses the mark.
Given the mechanism of american healthcare there will be millions of denied claims even if all the profit of the insurance would be reinvested and all employees including the CEO would be volunteering.
While that would absolve the CEO from the moral responsibility of profiteering it wouldn't improve the lives of the many people whose claims must be denied because of the mechanics of the heath insurance system.
Given the current system, the insurances must stay afloat and if the bankrupt that will affect even more lives.
Furthermore, hospitals have a different set of incentives which are not aligned with reducing the pressure on the healthcare insurer.
You could say "but the government should not allow that and it should just bail out the heath care insurers that go bankrupt in order to save lives". Yes you could say that.
Would they? Should somebody try that? Should some CEO of a major healthcare insurer be brave enough and bankrupt the company they're supposed to manage just to force the hand of the government to fundamentally prove that healthcare is a public good?
Should a CEO be shot for not risking everything to force the government hand?
Or should a politician get shot because they didn't improve health care when they could have? Which politician? Every politician? Only the top level ones? How time we would give them to make the change? One term? Two terms? Punish them when they retire after not having fixed the healthcare?
Despite all the power that the people have on paper, democracies are only as good as the public discourse that unfolds in such democracies.
Do we really think that we can solve problems as complex as healthcare by shorting at whoever our ape brain thinks is the most proximal responsible person?
It's not like the world isn't full of examples of countries where healthcare is approached as a public good from the ground up. There are plenty of places where you also have private healthcare on top of that.
Why don't you just take the opportunity to push for actual reform. Siding with a murderer is not going to help your cause.