That's the reality that owners of corporations face all the time. We impose an extra (and typically rather substantial) layer of taxation for owning a business through a corporate form rather than, e.g., as a partnership or DBA or an LLC. Profits are taxed as they are made (through corporate taxes) and then taxed again as they are distributed to owners - it is, in effect, double taxation of the same profits.He has a point. If you paid 30% copererate tax before paying income tax you would be pissed too.
That said, Apple's commission isn't a tax - attempts to disparage it as such notwithstanding. Parties paying that commission are paying for something (they must consider to be) valuable. Most notably they're paying for the right to use Apple's IP. They don't have to do that. They choose to because the use of that IP allows them to do things they otherwise wouldn't be able to do. Apple is providing them the ability do things they otherwise wouldn't be able to do and in some cases they're able to make a lot of money (or a lot more money) because of it.