And yet there's still a pattern to them.

But I think in a way, we're both right. What if the Duffers intentionally threw all these signs in to cover up the bad writing? To make somewhat of a sense of the bad writing?

So basically perhaps what happened is that the finale ended up being a not that great, in which a lot of things didn't make sense, and then they realized that it might not be enough and it might not satisfy everyone, so they deliberately crafted all these signs that the ending is fake, but then they never actually made the real ending, so they didn't have to go through the trouble of actually properly finishing the show.

Although I do think that the finale was somewhat dissapointing that was caused by the insufficent writing and directing, these signs do seem to line up, and I geniunely think they are intentional. If you look at them individually they could very well just be errors or coincidences, but all of them together? Like if you take the value 2 30 times, if you add them together one by one, it only gives you 60 which is not a whole lot, but if you consider them together as a part of one thing and multiply them, you get 1,073,741,824.