Before the final few chapters, I have one of my two main characters go mad and turn into the antagonist. After the pivotal moment that tips him from an anti-hero and well meaning but fuck-up ally that gets someone close to him killed, in the chapter he withdraws into himself. Most of the chapter is internal monologue with the occasional hint like dialogue from undescribed persons separating paragraphs implying he is doing something in the middle of his soliloquy. But the internal monologue comes on a bit thick and seems to me like an exposition dump and summary of the alluded mysteries leading up to that point.

Would it be better for me to keep that as is, or change the chapter to be entirely without his inner monologue and merely describe his actions, as if the reader is locked out of his mind from that point?