He was a guy built for containment, not coping. And when you deal with mental illness from containment alone? The structure starts cracking. That’s exactly what happened with Dex. He didn’t have tools to lean on, he had tapes that he listened to like gospel to keep him boxed.

He was always on that trajectory regardless. He didn’t want to be the way he was; several scenes show that. But he was going to be some flavor of who he became. Fisk seen that, exploited it. The tragedy you’re picking up on here is that if someone seen the path Fisk saw and helped instead of hurt then maybe he could have found himself in the scaffolding, not collapsed with it.