So, because people can "always get another job", you think it's right that Microsoft under Bill Gates (unethically) crushed the companies that they put their time, money and effort into? Man you must be drinking some crazy corporate kool aid
A company is not a person, a person is not a company. Attacking one should not be considered the same as attacking another, our entire economic system is based around the abstraction of organization so as to shield people from legal liabilities incurred by simply pursuing trade. You can't have it both ways, to both enjoy the legal benefits of a corporate structure, and then to be able to claim public sympathy when you get beaten in the market.
Corporate personhood is a dangerous legal concept that Americans believe in for unfathomable reasons, and it causes all sorts of ethical problems, particularly legalization of political manipulations that are considered corruption in other parts of the world.
The idea that "it's just business" so it's ok to do anything and everything that you can get away with (up to and including breaking the law) is a harmful idea. "Crushing" other businesses by participating fairly in the market is different than using under-handed tactics to win at all costs ("history is written by the victors," "might makes right" and all that).
However, it is entirely possible for these people to get another job.