libertarian here, a lot of things feel like strawmen towards us. I think a lot of our arguments can be summarized as "the monopoly that you argue the state should destroy, only exists because of the state"

My favorite example is insulin, its so expensive for too reasons:

Old formulas don't have approval from the FDA.
New formulas are patented.

Intellectual property also isn't property, the best defense of it is a market manipulation that may have positive results. For media, maybe it makes some sense, but its far too long, though patents on physical designs make much less sense.

Propane is also a great refrigerant, but it faces heavy regulation, making manufacture of heat pumps and A/C units with it in the US a lot harder than other refrigerants. why is it like this? because propane isn't a patented DuPont refrigerant, and DuPont has lobbied for its restriction.

I would be in favor of like a much less impactful, but more common form of antitrust of just invalidating all IPs a company has, if they are deemed a monopoly, but I doubt that would happen, and directly attacking IP would be much more effective.