Matt has PTSD because of, well. Because of his life. Though he's still generally pretty on the ball when he's Daredevilin', in his day to day life things start to fall apart because he only has so much energy, honestly. He starts having panic attacks on the regular again (there was a rough patch in college), violently flinches away from casual touch, has trouble eating and sleeping, has nightmares and flashbacks, and is somehow more hyperaware than usual with the senses that he has (and for the first time in a long time he starts getting paranoid about how He Might Not Notice Something a sighted person might).

He does his best to not let on, because he's Daredevil, he's never been through a traumatizing event in his life, he is a rock he is an island, etc., but Foggy and Karen figure out that things aren't going all that well pretty quickly. Everyone is out of their depth (and also not exactly in the best mental health place either), and things get worse before they get better, but eventually the power of friendship does at least help out. (I don't mind minor romance as long as there's no OC's or sex, but I'd prefer gen.)