Steam can absolutely be replaced. There's lots that could be improved in the process of sifting through tens of thousands of games to find the ones I want to play. I have Epic's store installed on my gaming PC as I still play Fortnite. It has none of the things I want improved over the Steam experience. Literally none.
Put up or shut up Epic. I'm unemployed so you can hire me to do it for you, but I'll bet you'd rather just whine about it.