The story doesn't say that MC's have PTSD. If the author wrote that Summer was killed in front of his eyes, in this case, post-traumatic syndrome on his face. But even so, something must happen to make the MC cry, like when he saw Victoria's eraser.
Show don't tell. While we don't get a medical record of the MC, Ocean does a brilliant job showing that the MC is deeply disturbed. And he doens't cry, he has clearly panic attacks. The cold sweat running in rivers the haunted look, well ok could be food poisening, but I stay with PTSD or something very close. Did you even play the last two updates?
as far as I know, the old version of the game before the rework was created by Regium, which became popular. According to this MC behaves differently. In the new version of Ocean, you have lost the fast-paced plot and actions that reveal the nature of new characters. On the other hand, a lot of unnecessary conversations and actions have appeared that do not make sense like a board game in the library. Therefore, it seems to you that the game has lost all emotions.
They were two when SG and WIAB started, no idea what the other guys name was, it doesn't really matter anymore nowadays. And while it was kinda a boring, comically over the top, falling down in high school version when they made it together it became something WAY better now. The over the top, stupid stuff is all over the place and I am SO thankful that Ocean does something different with his VNs.
And at last: Saying there are no emotions in Oceans SG is wrong on so many levels that I think you skipped most of the story/dialogues.
I will do what most others already do here from now on, because you are either a troll or an unempathic weirdo. Have a nice one.