Are you saying that Rocket League was removed from the Steam accounts of the people who already owned it? That sounds like a big deal, and surely must be illegal. But I didn’t see mention of that in the link you posted. Most of the things in the list seemed to be just saying that they didn’t think the Epic store is high quality. (eg. prices too high, not enough features, difficult to use return policy, etc.) Those are all fair complaints, and good reasons to not use the store - but again, they are only good reasons to not use the store. They aren’t really good reasons to crusade against it. There are heaps of crap online stores, and generally people just ignore them.
The Rocket League thing you mentioned would be a good reason to get upset at Epic beyond just not wanting to buy from them. So I’m kind of surprised to see it missing from such a comprehensive list of grievances.
Others have mentioned spyware, and like I said, I care about that. That’s a big red flag. But I looked at the links in the post you gave, and as far as I could tell they were all speculation. Things like Tencent owns 40% of Epic, and Tencent is bad - so Epic is probably bad. … Which is quite possibly true! I certainly wouldn’t want to trust Epic with my personal info. But it’s still a big step away from them having spyware built in.
I personally think that many gamers put up with too much privacy invasion and ‘telemetry’ in the form of online accounts and especially ‘anti-cheat’ software. The “anti cheat” software that some games require explicitly demand access to see every program you have installed, every program you have running, and in some cases even read RAM outside of what the game is allocated. That’s an enormous security risk and privacy breach… but people install that crap all the time with barely a whisper - but then complain about the risk the Epic will share its telemetry data with Tencent. I’m certain that some of Epic’s online games have software like that, but that wasn’t mentioned in thread you linked to.
Maybe I just don’t care about the same things that other people care about. Like, if Epic has a crap store… I just don’t care. It makes no difference to me how crap it is. It makes to difference if they say it is going to be great, and it falls short of what they said. I’m not going to go around telling people how crap it is, because I don’t think it matters. I don’t intend to use the store anyway; and if other people like the store for some reason, then fine. I don’t think it matters. They can like it, and I won’t try to convince them otherwise. But if they are somehow removing games you’ve already bought elsewhere - then that’s a big deal. That would be worth telling people about. I hope you can see what I mean.