First of all what the fuck was that like character and story-wise but also there are so many plot holes and unresolved things like actually someone try to answer these, here's a list:
Why is Hawkins in the Upside Down, why are all the buildings there, how were they physically created?
How did El recognize Will in Season 1?
How is it that El can make a psychic connection with a Demogorgon in the Abyss (this is how she opened the gate in S1) but cannot find Henry when he is in the Abyss?
How did El send Henry to the Abyss (in the Massacre of Hawkins Lab) without the Upside Down opening, time would have to be frozen on that date if that's when the bridge was originally opened, but it isn't, so she seemingly sent him straight there without a wormhole which makes no sense?
How did Will see the lights/letters if time is frozen in S1? How could Joyce hear Will through the phone, why did the phone short out when he tried to call 911, why did it fry during the call?
Why is it suddenly okay to blow up the exotic matter as part of their final plan when Dustin just said it would destroy the Earth, what changed?
If the Upside Down is frozen in time on Nov 6th 1983 how are all of Brenner's notes on the Upside Down there if that is the first time it was opened, how would he know any of that stuff, if it was only then created?
Why didn't Henry just make a physic connection to El to open a bridge like El did with the Demogorgon in S1?
Where the hell is the Mind flayer?
How can Demogorgons make gates, they don't have physic powers and its implied this is the only way to open a gate, to make a physic connection with someone in another dimension?
Why is the ground on the Earth side not the abyss side?
More of a continuity error, but I'm pretty sure on one of the maps they drew the circle of the wall on, Lover's Lake is outside of the wall which makes no sense cause there's a gate there?
How can an einstein-rosen bridge be made up of literal vines/living creatures?
How does time pass the same exact way in the Upside Down as the Earth and as the Abyss?
Now that that mind flayer dust escaped the demogorgon in Shock Jock, what's gonna happen to it? Even if they close everything there's still part of the Mind flayer on Earth?
