The author actually walked back a lot of the things I complained about, and the story thankfully didn't go in the direction I was dreading it would. The last three chapters (217-220) almost felt like a personal apology to me which was nice.
The author didn't pull anything out of his ass to resolve the war peacefully. The Nords ended up taking too many casualties, and were outnumbered and backed into a corner. The Lnu won the conflict and the Nords had to go back to Iceland, like how a real conflict of this sort would end. Thorfinn's attempts at peace did not cross the vast cultural divide between the two groups of people.
Einar ended up taking part in the defense and killed someone. He regretted it, but at no point was he portrayed as wrong for what he did. He was a good man who tried to make the best of a horrible situation.
Even Cordelia the troon and Hild the girlboss had to admit that they came extremely close to resorting to violence. In the end, Thorfinn is just happy that Einar understood the pain he was going through after having taken so many lives.
