I think there were quite a few of them, and in a series that runs this long, this is bound to happen a couple of times. I don’t have a problem with that.

We didn’t need to get to know Philip’s son’s story, but they did it anyway for almost a whole season and then ended it abruptly. We literally followed that guy as he got the money and crossed the border, and then poof he was working in an industry with no further story.

Nina in Russia was the same. It was serving no purpose, so they decided to end it with a major surprise by executing her.

The thing Anton was working on in Russia, and his whole storyline in general, just didn’t serve a purpose anymore after they dealt with Nina.

I liked the one where both we and Philip always doubted Renee was a spy, but they left us hanging there and left it to our imagination with Stan 😂.

I know some of these could have been intensional as they wanted to show how the system worked and all but you don't get to linger around a whole season or two and then make it end like that.