Whereas I've basically been copying the same DooM 2 install from computer to computer for 20 years.
Citation needed.
I'm not sure what you're referring to here. By my account, Epic has been among the better game developers for consumers. I wish Fortnite et al didn't use microtransactions—as far as I'm concerned, they always make games worse by building a purchase incentive into the design of the game—but it is free to play, so there's a limit to how much I can complain.
The fact that it's "free but if you want you can gamble here and look we made it fun!" actually makes that worse, not better. First it draws you in, then when you're hooked you have more trouble stepping out.
It's so harmless that even the non-monetary "engagement hacking" by other services feels like a burden in comparison (e.g. Steam's incessant notifications about new crappy stickers - stop stealing my precious time!).
The transparent llamas certainly had nothing to do with events in Denmark and Belgium -_-.