That’s where it loses me, though. As soon as he finds out it’s the Kingpin behind everything why does the decent continue? He knows what’s going on and why. If things had just continued to get worse and worse without anything indicating anyone or anything then Matt losing his mind would maybe have had more credence.
Why do you say his senses weren’t reliable? Because he envisioned beating the Kingpin while he was still in the room? His sense were reliable enough to take out the thieves on the train.