I think Local 58 worked because it had good production values, and was simple. It wasn't pretentious crap trying to be this big epic ridiculous thing.
Now that I think about it, Smile Guide also didn't took itself seriously, yet it was successful in freaking people out.
For example, in Episode 2, Agatka straight up says to Małgosia "jeez I know, get lost you downie", the type of shit you'd say to your friends while you were growing up.
And the shitpostiness went off the charts in Episode 5 and 6.
But it was still somewhat disturbing, and most importantly, no one knew who was behind it all right until the very end.
All those years, no one knew who was behind the project, even if it was clear it's not lost media. But it did have all the elements that seeped into your consciousness, making you feel like you've seen it before. Maybe some old show for kids made back in communist times you'd watch every night at 19:00 on the first channel before going to sleep, a vague childhood memory of some sorts. But it's all distorted and it feels like a fever dream, or even a nightmare. The ending of episode 4 especially feels like a nightmare I had as a kid. The story of the series is loose and vague enough so that it sorta makes sense but at the same time it doesn't and it's full of hints for people to come up with theories with.
That's what made Smile Guide so successful, you had no fucking idea who was behind the project, and the project played perfectly into your memories, even though it wasn't overtly serious and it was breaking the facade many times. Plus, the story it tried to tell wasn't a clear cut story with detailed lore, it was just enough to keep people confused and interested in finding the truth.
If there's someone to make a successful analog horror series in the US, take Stribog's work as a lesson. Keep your identity as a creator hidden, and make your series play into the common memories people have. It doesn't have to be super serious, it doesn't need to be heavy with lore. As long as you keep people on the edge it's good.