I appreciate your cynicism, but history has shown that slavery is unsustainable and that humans resist and succeed against it time and time again. In this same future you've described, we will value and own the corporations instead of things directly. The reason we will remain under the illusion that we have autonomy and freedom will be, despite having lost the ability to hack everything we own, we will have the ability to choose from many competitors who operate much differently and cater to specific types of users. No longer will we need to be lone islands of hackers to get our use-case working great, we will collectively organize around our use-cases to develop the most compatible products. The wealth of open-source software and specifications will be a foundation for these new businesses to operate from. It's inevitable because the pressure from consumers must be relieved in one way or another. The founding of companies like Framework seem to exhibit this principle at work.

Squeezing on one side inflates the other side.