Objectively, I don’t disagree with your assessment of the Russia subplot. It does go on a little bit longer than I maybe would have liked. However, I think the strength of the rest of the season makes up for that and some of its other possible shortcomings.
Strongly disagree on Episode 4, though. Regardless of my feelings on the entire Russia subplot, I thought the episode did a really good job at gripping us with the tension of putting our different groups characters in situations where we thought we knew exactly how they were going to pan out, playing with our expectations, only to subvert them at the very end. We think Argyle is the first to arrive to pick them up to rescue El. Nope, it’s the US Army coming to ambush the house. We think Joyce and Murray are going to have an easy journey to rescue Hopper, who has just made his escape from the Russian prison on his way to freedom back home. Nope, they end up getting drugged and captured, the friendly guard gets ratted out and Hopper is recaptured. We think Max is going to bite it at the end by Vecna’s hand like everyone thus far, but a solution is found to combat his evil methods to take his victims. Even then, they really play with the expectation of whether or not she will actually make it out alive before the credits roll. Without everything else happening in the rest of the episode feeding into that, it would not work as well as it does.
Understand your complaints, but overall, I am greatly loving this season, even more than season 3. While I really enjoyed the last season, it was definitely more popcorn fare and didn’t have a whole lot in the way of deep character exploration and introspection. It was a blockbuster movie, and I was okay with that. But, I really love this season because it brings back a lot of what I really loved about season one, and in terms of tone and horror, expands on the mythology of the show a lot more, particularly in regards to the Upside Down and the Hawkins Laboratory backstory. It has flaws for sure, but the flaws don’t dampen my engagement and enjoyment for what happens in the ongoings of this current storyline. Even in the lesser plot lines, I am still entertained by the hijinks the characters find themselves in.
Agree to disagree.