for me it's sort of like streaming services
i've got netflix, hulu, and amazon prime video. even if cost weren't an issue, i don't want to have to go in a dozen directions to find the content i want
with games i've already got gog, steam, and my nintendo hardware. same deal. launch exclusives will show up eventually on other services, especially AAA titles that i refuse to pay full price for in the first place so getting it in that window doesn't matter to me. permanent exclusives? well, i've already got plenty of games i haven't even played yet.
so for me it's nothing specific about epic, it's just they came to the party late and i don't want what they're trying to sell me.