As many have already noted Esp. 1 to 4 are some of highest quality TV show I had ever seen. They set the bar so high. I had bought into the dystopia premise, I was engaged and engrossed by the bleak narrative set out by the first 3 episodes and invested in the both sets of protagonist's and what they would do next.
However from Esp. 5 all of those threads unraveled . I like challenging thought provoking sci -fi however It genuinely felt like the last few episodes hadn't been storyboarded. ( which I'm sure they where ) It was as if the director / screen writer didn't even considered " Are we taking the audience along with us" ?
After all that, I still recommend watching it.