> Governements abuse people more than an economic system ever has
This is true on one level, as economic systems are not actors, but abstractions for aggregates of actions; its false on a more concrete level because governments are also not real concrete actors but abstractions for aggregates of real actors.
Both governments and economic systems (and corporations, which you seem to drop in as ig they were the same as economic systems) are abstractions through which real actors act, including to oppress, and very often actions by thr same actors involves all thrre abstractions (even a single action might). Corporations, after all. are themselves creatures of gogernment through law, and economic systems exist only as ideals without being made manifest through legal systems.
> A corporation has never marched people to camps,
You probably don't want to think about most of the best known early joint-stock conpanies (any of the variously East India companies, but especially the British, the Royal African Company, etc.)
> If I don’t want to deal with a corporation, I have the right not to — unless government forces me to.
Corporations—like any individuals—can and do apply coercive force on their own with only after-the-fact review by governments (and, in many cases historically, with obvjecting governments having limited power to apply sanctions), so, no, this isn't correct.