>Your options are buy the class of stocks that the company wishes to sell, or not participate at all.
Respectfully, I think you're confused about what a "free market" is. What you're describing, where market participants can compel the sale of a firm's assets, is antithetical to a free market.
Free market: “voluntary exchange and the laws of supply and demand provide the sole basis for the economic system.”
It’s voluntary exchange, yes, but it is not a driven by supply and demand. In the same way that the 1970’s oil market driven by the OPEC cartel was not a free market either. If you don’t like the control that Zuck has, can you express that dislike by buying shares of Meta that don’t include unequal voting rights? You can’t, because this is an issuer controlled market.