Just too much meaningless crap going on all around at the same time, which only manages to distract you from what should have been the central event, Thorfinn's encounter with Floki. Because it is drowned out with all that noise, the gravity of their confrontation has no room to properly resonate.
I guess I see Yukimura's intentions behind the way this battle is written: I suppose it is meant to be so chaotic and overwhelming to a) underline the inherent absurdity of the whole strife and warfare at large, and b) to truly test Thorfinn by pushing him to his very limits. But damn, does it all make for a tiresome reading experience... Well, at least the exasperation and weariness that those chapters evoke give you a sense of what it must feel like to be in Thorfinn's shoes.
The sequence I liked the most was a self-reflexive moment of a random soldier who realised the meaninglessness of the Viking lifestyle just as he was about to meet his death. Which is kinda telling: out of all this madness that's been taking place, the most gripping event turns out to be a peripheral cameo at the beginning of the volume that functions within the narrative only as a general comment on the margin of the main story.
But then I guess Yukimura's writing achieves what it was probably meant to achieve: it was good to see Thorfinn go berserk for a moment, even if the entire arc was too obviously designed to reach that point.
It was good to see him in such a state because he's become a bit too saintly for my tastes as of late. Which makes me ponder whether Yukimura doesn't elevate the Christian values at the expense of the Viking ones a bit too much. I'd really wish to see more criticism of Christianity as well in the future arcs, just for balance.