There's a lot of prejudice towards Epic because Fortnite is the most popular game of the moment. But if you look at the response of Sony buying Insomniac, it's mostly positive (at least on NeoGAF) and that includes people suggesting Sony should buy more and bigger studios to get more exclusives.
Buying a studio which then means paying for the staff and everything that has to do with their game making is quite a different thing to swooping in and paying games almost ready for release, therefor with little risk as they can evaluate their potential, just to cancel their Steam plans.
And yeah some of them come out with PR about how the deal lets them do it that much better but it tends to be pretty obvious damage control bullshit and the games when out resemble exactly what they were even if they got a delay (possibly to develop features Steam offers built-in).
Nobody says Fortnite/Unreal/Paragon/Whatever shouldn't be exclusive to the Epic Store either, duh. Just as Valve's own games being exclusive to Steam is only natural, but any other game makes the choice to be or not be elsewhere without Steam paying them a bonus for either choice.
So yeah there are Steam exclusives here and there, but the difference is they're exclusive based on what the platform offers to the developer and the users, in short its quality, versus Epic paying a developer to ignore its objective inferiority in pretty much every way (and to pimp it on top).
Nobody judges Epic Store based on prejudice, just by what it offers compared to the competition. Which is nothing outside some Fortnite money lottery reserved for specific lucky games which contrary to Epic paid PR does nothing for the industry or indies or anyone outside those few.
What's with all the disingenuous comparisons in this thread, lol. Well, every Epic thread.