Well, I have four big ones:

• System scanning: EGS is known to automatically scan your system and send your data back to them. While this seems to be the same type of analytics Steam does occasionally, in Steam's case, it's opt-in, and done with full, informed consent.

• Paid exclusives: Epic has been known to pay publishers to make their games artificially exclusive to their own store. They regularly claim this money is to support the development of the games in question, but this is easily disproven, as they've been seen buying games known to be complete more than once. Additionally, this has resulted in bait-and-switch-like situations, where users would prepurchase Steam copies of games, only to be informed that they wouldn't be getting them.

• Publisher-centric behavior: Another user here claimed that EGS is pro-developer and anti-consumer, but this is only half true. This only rings true in the case of self-published games. There have been cases of developers getting unwarranted backlash after aforementioned bait-and-switches, when they were just as surprised to learn about all the "development support" they received as anyone.

• Tim Sweeney: Tim Weeney, the CEO of Epic, is an asshole. A giant, narcissistic, hateful shitbag. Just look at his Twitter, the dudes a giant POS.