the goats are plot relevant

So, in the season finale, Fadime finds out that Iso knew about Eleni's secret and kept it from her. Her reaction? She dumps him, files for divorce, and burns her wedding dress. She plans this revenge and doesn't give Iso a chance to explain himself in the moment. And it's exactly that — Fadime punishing Iso and the way she does it — that sparked so much negativity from fans.

Here's what I think is behind that reaction:

The main reason imo is that Iso is a really good male character. He's written as empathetic, emotionally available, caring, loyal, brave — a guy who clearly loves his wife. He doesn't stifle her, he accepts her as she is, he does all the everyday acts of care that are so often alien to men both in real life and in fiction. Iso is an absolute green flag all the way. On top of that, he loves his family while still seeing their flaws. That said, he's not perfect — he did kidnap Fadime, and he did lie to her.

We sympathise with Iso as a character, and we admire him as the kind of man we rarely see in real life. And that — the fact that Iso embodies an ideal of masculinity — is, I think, the core reason for his popularity and for why Fadime got so much hate for how she treated him: she didn't appreciate this "perfect" guy.

his imprisonment is also a punishment to şirin, who abandoned all morale just so he wouldnt be sent to jail again

taking away all of furtuna's belongings and giving them esme was THE punishment for zarife, who did all that she did for power and money

as for oruç, he has been punished by losing eleni and iso is also being punished by losing his love

1. In the last two episodes of the season, we see Iso, empathetic and very focused on Fadime, not noticing changes in his wife, like the frantic shine in her eyes (applause to the Zeynep Atılgan's performance). This is OOC, and was intentionally written to set up the scene in the final episode of the season with the burning of the wedding dress and Iso's capture.

2. Throughout the first season, we witnessed Iso's long journey of separating from his family, its traditions, and the logic of blood revenge (by the way, a great character arc, one of the strongest in the whole series). But the reasons why Iso keeps the secret weren't written strongly enough; everything got mixed up – his loyalty to Esme, and the desire to protect Fadime from the truth that she will not be able to keep, and that may push Adil to the irreparable, and his love for the family and desire to protect them from Adil's anger, and loyalty to the clan.

Despite the somewhat rushed finale, it seems to me the writers managed to convey the most important thing: the ruthless logic of blood feud.

In this paradigm, it doesn't matter who's truly to blame, who committed the crime; everyone who is related to the clan by blood will be involved, everyone will pay.

Thus, Fadime, feeling the pain of Iso's lies, instantly saw him as a Furtun's son. He ceased to be a separate individual from the family, her husband. They once again found themselves in the dual system of two warring clans. Blood feud deprived Fadime of personal happiness with her beloved.

Eleni, having found a blood family, also inherited their history — a blood feud. She now sees the world through their eyes: black and white. Belonging to a clan deprived Eleni of the merciful and compassionate attitude toward people as simply people.

Oruch and Iso, who did not steal a baby and did not kill, pay for the sins of their fathers and for their love for their mother and grandmother — the most human feeling — by being deprived of romantic love.

These four young people, forced to keep family secrets and act as is customary in their clans, fell victim to an endless blood feud.

And that's why all fan discussions about who's to blame and who deserved punishment more are pointless. The logic of blood feud makes everyone guilty just by being born into the family.

Well, she couldn’t do otherwise. And here’s why, in my opinion:

1. Fadime has a trust trauma: she does not trust people, and in her eyes, Iso, having lied to her about the secret after they agreed not to lie to each other, after she trusted him, essentially learning a new behavior pattern, betrayed her. Trust trauma is repeated.

2. Fadime has an abandonment trauma: her parents died, leaving her (the story of her mother’s death, who died of a broken heart while her children, specifically her daughter, were not enough reason to live, deserves a separate conversation), her brother went to prison, leaving her. Iso, lying about Eleni, makes their marriage impossible, because he again becomes Furtuna – the one who lies. Fadime feels abandoned again.

3. Fadime absolutely cannot handle her emotions: she can't slow down, think things through, or see someone else's perspective because the only significant and influential adult figure in her life — her brother — never taught her how. Adil can't manage his emotions either; he acts according to what he feels, without thinking about the impact his anger, rage, happiness, love, sadness, or longing has on the lives of people around him, including those close to him (here, I really want to talk about the incredible emotional work Esme does in their relationship, and about women's emotional labor in general). Fadime completely copies his behavior.

The breakup was the right thing to do though, not because of your first two points (those mean the breakup is in character for her and I could totally see her breaking up with him so that he cannot do it to her) but because of the feud. You cannot be in a relationship with someone from the enemy family if they hide the wrongdoings of their family against your family from you. At least if you have a good relationship with your family. (And no, Fadime didn't do the same thing—she hid that they knew about the wrongdoings against her family and were planning to get justice for that. Which also isn't good, but that's not on the same level.)

So imo the breakup was the right thing to do, but the way she broke up with İso was not. It was too cruel. I understand why she did it like that and it is consistent with her character but I don’t think she will proudly look back at that.

Additional to your third point: I also think of all people involved, Fadime has processed the past trauma the least if at all. She was so young when it happened and she had lost her adult support system so she just didn't have the necessary tools or someone who could give her these tools to work through her trauma and it shows.

İso and Oruç still had their mother and their grandmother, Adil and Esme were older and so probably already had better tools to deal with everything and Eleni obviously hat do deal with her own problems but she didn't know about these specific events until she was much older.

"لدى الناس الأخ يهدي أخته هاتفا أو عطرًا، أو—لا أدري.. ثوبا؟ أما أخي فيهدي لي مستودع وقودا لأحرقه!"

لا أريد شعري الذي لمسوه يا أخي