It’s hard to see how a court could rule against Apple given the facts. You can argue that the App Store rules are anticompetitive to software vendors, but to claim Apple holds anything resembling a monopoly on smartphones is asinine, and trying to reclassify it to “performance smartphones” is even worse.
The market for internal combustion engine production cars with over 600 horsepower is dominated by a handful of Italian car manufacturers. Do we then sue Lamborghini because my Toyota can’t use their proprietary wiper blades?