Plotholes Everywhere in Season 3

OK I'll have a go at those.

Hopper isn't the only cop in town. A giant monster roaming around and nobody phones the deputies? I know it's a small town, but nobody drives anywhere. Nobody but the kids notice mayhem at the mall?

- my guess is multiple people phoned the local police department who in turn alerted the feds who alerted the army. When the monster was roaming there would have been chaos - jammed switchboards etc and it would have taken a while to summon the military.

Soviets with machine guns and children decide to investigate instead of contacting local law or FBI?

- the kids learned early on not to trust authority in these matters because they could be in on it, so it was safer to do it themselves.

No security cameras on the elevator or warehouse entrance to warn the Soviets of intruders?

- I can't defend this one. The soviets must have had a considerable number of people working on the top-side of the facility, in order to get food, supplies, new recruits etc. It's laughable that anyone could just walk into the lift.

Alexei just happens to blab everything to the Americans? Why?

- He was terrified and wanted to get away from the Russian military - they already said they would kill him if he didn't manage to get the portal open.

Alexei shot and nobody calls an ambulance?

- Murray hid him by the side of the trailers, presumably nobody noticed him until all hell broke loose with the monster, and by then he would just have been ignored anyway in the chaos. What was less easily explained was how the Terminator guy was able to just wander around the funfair with a pistol in his hand without being noticed. Guess people were just too busy having fun.

How would Hopper leave facility when place was flooded with U.S. security? Why would Soviets take him anyway?

- If Hopper did survive, it could be easily explained in some way. Eg he fell down a shaft when the laser beam exploded, he was concussed and not found for a while, the feds assumed he was Russian and put him with all the other prisoners who got deported, or something like that.