If I were watching this show for the action, I'd have checked out after the 3rd episode (and not come back this time, lmao), because action has NEVER been their strong-suit.
What is the reason you watch this show for?
My own reason is Kara herself (though the show disappoints me in how little they explore her internal life especially in latter seasons*), Danvers Sisters, Melissa Benoist and Chyler Leigh, with MB and CL playing a big part even in my love for Kara.
I think if those four elements get completely destroyed and I'd leave the show. However, at least, 2 out of four has always been there; and many a time 3/4.
*For example, I don't want it harped on, but I'd like at least one episode every season exploring Kara's anger and sense of loss, which is a big part of the character along with her sunshiny nature and compassion. They did that in the past seasons: that is why Red Faced, For the Girl Who has Everything, Girl of Steel and Triggers are my favourite episode.
This season, they could have had an episode where she feels angry and betrayed at the way the country and the world she has strove to protect treats her (completely different from the way they lost faith in S1 when she was still new); because it would have been natural for an immigrant to experience. There were scenes where Melissa Benoist expressed those emotions, but they were never explored. (The scene where she burns the photos in Kasnia comes to mind; or the one where she saves that guy from the car.)
She could have talked to Alex and J'onn about it. Not just the confusion she felt in the earlier episodes but anger and a punch at a table or something along with talking.
While trying to give the story from both sides and the balance, they didn't take as much time trying to tell the story of how Kara would feel and how justified she would be in feeling that. (Which is pretty much the case through out the show. Kara is left to flounder in her feelings without the show providing any justification for it through just a discussion with other characters, so that people judge her for not being the finest, most perfect and giving person ever.). I consider that unfair to Kara.
Some of it is on the viewers but some of it is on the show.
Note: Apologies. I was just curious about that question and then I ended up writing an exposition on my own feelings on the show.