Adding them as non-steam games to steam solves half of your complaints right now.
Then why did they create the $100 Million Epic Megafund this year to do exactly that?
This is patently false. The payment options for which fees are passed on to the user are a tiny minority of what is use. Epic has said in China it's less than 1% of what is used.
It's more amazing to see so many otherwise rational people continue to willfully misunderstand and misrepresent the concept of competition in order to justify their anger.
Many EGS games are not compatibility with Steam features even when added to Steam.
This is a known thing