You could end this entire post here, because this is the crux of the argument.
'Deserve' is subjective in this topic; everyone is going to come up with a different percentage. It doesn't matter whether it's 1% or 99% - Epic willingly became an Apple certified developer released content under the acknowledgement that the fee was 30%.
I disagree, if you want to be in the mobile app space, you can only "willingly" chose between two vendors, both which lock you into the same uncompetitive terms. That is monopolistic. Both companies know the level of control they have because of their market share, and know that you can't be in mobile without being on their platform. That is abuse. Doesn't matter what the agreement says if a court decides its unenforcible or illegal. You can't do much of anything in technology these days without being on mobile. We aren't talking about a subsidized console where Sony needs to make their money back, we are talking about access to 1.5 billion handheld computers bought at full price with high levels of profit up front.