It's a good question: What devices are included in capitalism? In theory, boycotts could indeed check all kinds of corporate ills. In practice, this hardly plays out in ideal ways because there's a divide-and-conquer strategy going on. The citizens of individualistic societies have trouble working together. We become tribal and we demonize those who belong to different informational ecologies. So what are the chances that enough of us can get on the same page to correct some corporate wrongdoing? We can't even form unions.

A corporation enforces a unified culture within itself because it's not structured by a capitalistic free-for-all. The corporation has the same sort of dominance hierarchy you'd find in militaries and medieval societies.

Again, in theory, antitrust laws could work. In practice, they're rarely enforced because the enforcers buy into neoliberal culture or they've been indirectly bought off.

Sure, orthodox economists would maintain that economies are close enough to physical systems for their models to be useful. But how strong is the analogy? If it's weak, the models would be misleading. The fact that physical categories apply to objects, whereas societies are comprised of people (the quintessential subjects) is a major point of dissimilarity.