Damn, that's unfortunate. I guess since you have a legit copy of the game, you might be able to get some proper tech support help, but I don't know if either Epic or Bethesda actually offer anything like that at this point.

There not being a redist folder is making me think it actually is an Epic Games Store issue, with it just skipping out on the redistributables, but reinstalling ought to have fixed that. Maybe reinstalling the whole launcher could work, but that might be really annoying if you've got a ton of games, I don't know how exactly Epic have implemented it and whether it's possible to easily repair the install without much disturbance.

Alternatively, just installing all of the different .NET and C++ redistributables, hoping that one of them will fix things, but this will definitely be really annoying and time consuming. I've been unable to find a list of which ones specifically the game requires, at this point the only thing I can think of is downloading a torrent and getting them from there, which might not be viable if you're in a country where ISPs actually whine about that and you don't have a VPN (and is also obviously a hassle because the game is like 50 gigs, but I'm just out of ideas).