Season finale doesn't make sense

Spoilers...
Maybe you should ask if that is so, why did the USA see her as a traitor and bar her from ever coming back to the US. She can never see her daughter again. If she does come back, she will be charged with treason. Although, the revelation of the flight recorder’s findings exonerates her from being charged of killing the president, she’s still a pariah to Saul and US intelligence. So with that in mind, she’s gained Russia’s attention and respect. To go against the US to the point of almost killing someone that is your mentor and who you hold in the highest esteem, and betray them, is kind of a loyalty test to Yevgeny and those in power in Russia. It was genius on her part for her to lay low for two years under the guise of writing this book. It kind of locks her in place in Moscow. And you saw Snowden’s photo in her “post-its lined walls” of her study/library. She is also firmly in place with her lover Yevgeny who trusts and loves her as much as he can. As far as Carrie finding out intelligence, I have never seen anyone find out stuff like she does. Don’t you recall the first episode when she knew an American soldier had been turned and was coming back to the US - no one believed her. She turns the escort of Saudi lover and finds out the necklace is used to finance a terrorist act. She’s a manipulator and reads things like no one else. Even in her manic state, she figures out the lows and highs of Abu Nazir’s life and how his son’s death influenced Brody. Even in this last episode, she figures out when no one else could - that Saul is running an off the board Russian agent for 20 years and the identity when no one else could. She gave her up to circumvent a nuclear war. The whole last part of the episode has a general lightness - the beautiful apartment, the necklace, going to this fantastic jazz concert with her powerful boyfriend at this beautiful theater (although all filmed in Los Angeles), you really felt she was in the best place she has ever been in. Yet, you wonder - she’s fearless but she screws up too - and how long will this last before they figure it out. And when they do, what happens to Yevgeny too. At some point, they will figure it out and she will go the way of Anna (or Nina as in The Americans), which she is prepared for.

When seen in its totality, the ending was fine, in fact rather brilliant. But it takes some unpacking in one's head to get there...

I didn't get the impression Carrie is being let in on Russian secrets. Instead, she's working assets---we saw her make her pick up at the theater when she went to the ladies' room. That's how she got her first huge intel after 2 years of cultivation--because the scroll in the book she sent Saul said: here's the first drop there will be more.

And yes, she will likely get caught at some point and pay the price. But she's still giving 100% to Saul and her country. Saul's convo with Jenna was prophetic---he told Jenna that Carrie always does what's right no matter what. It's the no matter what that's going to be her end in Russia probably.

The ending with the jazz concert in the theater was perfect to convey what the entire finale episode was about--Carrie's the new asset.

And it showed she created perfect cover for her pick-up. She was known from the first season to be a big jazz fan. So going to a jazz concert with a favored group would be a natural that Yev would never question. Ergo, she used that concert set up for her intel grab from her first big asset and her fandom was an unquestioned reason to be there.

All along in the finale and penultimate ep, we were misdirected about what Carrie was doing and why. She had already developed Plan B after Saul's asset died, but we were not let into the secret until the very end--when we realized most of the finale with Carrie had been a complete misdirection by the writers. She was workin' a plan all in her head as to where she was going--and it was to Russia to replace Saul's asset.

The ending was perfect. It was a gotcha moment from the writers!