My issue with Epic is mainly an issue with monopolies in general.
As a customer, monopolies, especially "middle-man" monopolies, will always end up screwing me over in the long run. Most especially when a middle-man is dumping money to create an artificial monopoly out of an inferior product, which is the case with the Epic Store.
In the long run, helping the Epic Store (or any otheer) to create a monopoly out of their inferior product is, from a customer point of view, firing a shotgun at my own feet.
So I do the only thing I can to safeguard my in interests as a customer: if a game is sold exclusively in one particular store, I don't buy it. Or buy them only when they cease to be sold exclusively on a single store, but then only at a heavily discounted price. No matter how nice the game may seem. And after all, it's only games, it's not like I actually need them.
The only exception I make for "exclusives", if the developers are selling their games exclusively on their own site/shop (lie FD did at first with ED).