If your complaint is the money they take in exchange for sales, it's literally impossible for anything but the fact that paying them nets you significantly more money to be meaningful.
Valve built PC as a platform. If they never existed, you wouldn't get 10% of the PC sales. That absolutely means they're entitled to their share. Platform development is a massive value add, and useless jackasses trivializing their contribution by pretending that the massive development project of building a platform isn't every bit as important as single products on the platform can fuck right off.