The entire complaint seems to be centered around the idea that you can’t sell the game for different price off platform. That’s demonstrably untrue. You can sell the game for a different price of platform as long as they’re not using steam keys. Which is hardly an unreasonable onus, It’s not hard to generate your own keys.
The other complaint seems to be about the 30% but again you can just distribute yourself. Of course then you have to fund all your own server architecture, that’s what the 30% pays for.