I understand the alarm, but let me gently untangle this, because the story doesn't quite hold together, and that's good news.
Dutasteride can't improve your crown and everywhere else while singling out your hairline to destroy. That's not how it works. It blocks DHT across your whole scalp, so if your crown is thicker and the rest improved, the drug is clearly doing its job. It physically can't rescue most of your head and attack one strip. So dutasteride isn't the villain, even if the timing makes it feel that way.
What's far more likely is the hairline being the hairline. The front, and the temporal corners especially, are the most androgen-sensitive and least responsive area to any medication. Meds routinely hold the crown and mid-scalp while struggling to defend the very front. Gains everywhere except the hairline isn't dutasteride failing, it's the normal pattern.
There's also a photo issue: in the first image your hair is forward and covering, in the second it's pushed fully back with the hairline exposed. That styling difference alone exaggerates the change. You're not comparing like with like.
Please don't stop it in a panic. By your own account it's improving most of your hair, and quitting would risk those gains to chase a hairline medication was always going to struggle with. If the corners bother you most, that's a specific conversation about that zone, not a reason to drop a drug that's working. Measure it with trichoscopy rather than styled photos before drawing a conclusion.
