I can't seem to find that one comment explaining the issue with them...
But for the sake of promoting conversation on Lemmy, what's the issue with Epic, and why should I go for Steam or GoG?
Note: Piracy is not an answer. I understand why, and do agree to a certain extent... But sometimes, the happiness gained by playing something from a legitimate source is far greater 🥹... coming from someone who could never ever afford to purchase games, nor could my parents... Hence I've always played bootleg, or pirated games.
TL;DR
What's wrong?
Their launcher has a terrible UI AND UX.
They make exclusive deals with studios to prevent other platforms from getting games. (Someone mentioned that Steam did the same thing in their infancy. Also, I have another question; why is it ok for Sony and Microsoft to make exclusive games for their consoles but not ok for these PC platforms to do so?)
They have been invested in by a Chinese company, Tencent. (Someone mentioned that it isn't that big of a deal, but idk.)
I just don't use Epic myself but do use Gog and Steam (with the ultra shitty EA launcher and Ubisoft Connect bundled with some of my games) and Playnite has changed everything unifying it all into that single launcher.
Full screen mode in Playnite works fine on my HTPC and as a launcher it does consolidate all of them into one place easily. Worth trying if you use multiple stores.
As for why I'm not using Epic, the whole paying for exclusivity with third parties really didn't appeal to me at all.
If the free offerings from Epic do appeal to you, or if they do better deals on localised currencies (especially if you do struggle to pay for things), don't worry about using their services. I wouldn't want you to deny yourself some entertainment just because other people have issues with them as a business.
My first purchase when I'm earning enough to spend on entertainment will be a good device. The second will be games that I can either physically keep or digitally store on physical drives.
Gog is the main place for that, since their principal stance is DRM-free downloadable installers. They have a launcher too, but it's optional and only meant as convenience. Itch.io does DRM-free too, but they're often more about very indie and often experimental games. They have a few all-time indie classics though.
Steam technically doesn't require the games to implement DRM, so a part of their library is DRM-free once you've passed the installation process (they don't need steam to be running). This is on a case-by-case basis though. Lots of Steam games use steamworks (Steam's very own DRM) and a lot more use third party DRMs (and even require external launchers like Ubisoft's or EA's).
For years I have been a bit pissed at Steam for opening themselves to all and every shitty fake game/quick buck asset flip there is out there, refusing to do any kind of curation. Instead they opted for letting the almighty Algorithm do that for them. I doesn't work, their store is a discoverability catastrophe full of shit.
That said, I still buy from them in some cases, and these cases are mostly down to one point : the workshop, the integrated mod and user content interface. It's for a handful of games that profit a lot from it, but it's undenyingly convenient.
What I often do if it's a possibility is buying directly from the developer, which often includes a Steam key. That's what I did for Rimworld and Dwarf Fortress (through Itch.io). It gives you everything Steam has to offer for the game and usually a DRM-free version too. Only "down point" is that your Steam review doesn't count for the game's Steam score when you have activated it from an external key. I don't care much for that.
In the end at that point you've noticed I talked about a lot of different platforms and launchers, and it's not even all of them. Like the previous poster, I can't recommend Playnite enough. It's a meta launcher that makes all of your libraries united in the same place, with a lot of options. You still require all the platforms installed, but you're not using them directly most of the time.
I've got Steam, Gog, Humble, Ubisoft, EA, Amazon, Xbox, Itch.io and yeah, even Epic through it (though I only use EGS to get the free games, I don't plan on buying anything from there).