First of all this series is beautifully shot and well made. Characters are very well explored and I think the writers do a great job of showing the complexity of human characters and relationships.
I found that in the end the narcissist was Leyla's finance Omer not Cem (played by Hakan Kurtas who does a great job at creating an aura of mystery around his character and who he really is) and the assumptions she made about Cem and the red flags raised were what she wanted to see to convince herself that she should stay away from him. Her fiancé (the narcissist ) did a great job of convincing her that she was the problem in the relationship exactly as Cem's ex wives described a classic narcissist they were describing themselves and Omer.
So there is a lot more to this series and contrary to some comments the ending is not pointless and characters complete their journey as far as the first season allows.
I found that in the end the narcissist was Leyla's finance Omer not Cem (played by Hakan Kurtas who does a great job at creating an aura of mystery around his character and who he really is) and the assumptions she made about Cem and the red flags raised were what she wanted to see to convince herself that she should stay away from him. Her fiancé (the narcissist ) did a great job of convincing her that she was the problem in the relationship exactly as Cem's ex wives described a classic narcissist they were describing themselves and Omer.
So there is a lot more to this series and contrary to some comments the ending is not pointless and characters complete their journey as far as the first season allows.