You summarised them as "two wrongs", and no reasonable person would compare say jaywalking with genocide by saying, "well, two wrongs don't make a right!", yet that is basically what you did.
LOL, talk about whitewashing it as much as possible. The CEO isn't "anyone employed by the company", they're the one who green-lights the major policy decisions, the person where the buck ultimately stops.
In a fully just and functional justice system, doing the kinds of things that American health insurance companies do on a regular basis should be straight-up illegal. Every time such a company dreams up a new and immoral scheme to make money, the government and justice system should be countering it. America doesn't have that counterweight, so basically these companies are getting away with mass murder because profit is held in higher esteem than morality.
It should be dangerous to risk peoples' lives in that manner, whether it's because the official justice system will catch up with you, or someone takes justice into their own hands, and as I already said, the buck ultimately stops with the CEO. If your country lacks the proper checks and balances to keep greed in check, then you should absolutely expect vigilante justice. It seems to me that you're childish enough to wag your finger at the vigilante and not the problem that caused the vigilante to take action.