As viewers, we know this season of The Pitt is going to last for 15 hours, but as far as the staffers at PTMC are concerned, they’re relatively close to the end of their 12-hour shift. And you can tell they’re reaching their workday limit because the vibes at “4:00 P.M.” have turned absolutely rancid. When the victims of a horrific waterslide collapse are holding it together better than the doctors treating them, you know something is wrong. In fact, almost everyone is on their worst, most passive-aggressive behavior this hour, which seems like both an intentional part of The Pitt’s season-long…