The season one was 10/10, season 2 was still fine although you needed to turn off your brain when trying to imagine, that after a supersecret project of US government failed, they left the town inhabited and instead of army, scientists and CIA they left bunch of 10 year old kids, their mom and policemen to deal with the horrific scientific failure that would basically destroy our world. Hard to digest but still...fine. 7/10.

But then season 3 comes. 3-times recycled story needs new intrigue. So they take evil Russians, that somehow at the height of Cold war were able to build super modern facility underground in the heavily inhabited area in US within a period of few months without anybody noticing. People, police, government, CIA. Not to mention that they built the facility in the area where the most epic scientific fail happened just few months ago. This area, completely inexplicably, remained unguarded, unexplored, no decontamination efforts happened, no army stayed there. All cool, in case something happens, kids will take care.

Russians manage to transport half of their top army officers and top scientists in 1985 to this facility...again unnoticed. And then, 4 kids crack Russian secret code without knowing a word in Russian, get to this supersecret, superprotected facility thanks to a 10 year old, get caught, but don't get killed like those millions in Soviet gulags....no no...they spit into the officers face and run away, as in this supersecret facility they just never lock the doors. The evil Russians are so lovely that when they see intruders in their supersecret facility they don't even think about using those Kalashnikovs hanging on their arm and they just let 4 kids run around the facility like in Disneyland. Kids seem to have fun, all jokes, no stress.

I understand that this is a sci-fi and fantasy. But I assumed the sci-fi part was about the Demagorgon. It is supposed to be a thriller, not a parody on sci-fi movies. Very very bad.