A monopoly isn't a free market though, because, well, the market is not free. This ruling is precisely about making the market of payment processing on iOS more free, creating such a market.
Sure, we can say that it isn't true communism -- err, sorry, market freedom -- so long as we acknowledge that the incentives which create, establish, and perpetuate the monopolies emerge due to market freedom and attempts to curtail monopolies are regularly attacked under the banner of market freedom and that actual market freedom requires (metaphorical) mace-wielding regulators to regularly go on (metaphorical) skull-cracking expeditions which will be fought tooth and nail by investors seeking the windfall profits that come from monopoly.
Do we agree? Or will we find ourselves on opposite sides of this fight the millisecond the specifics of this case fade from the public eye?
