Dean did help himself. He grabbed and opened another beer while Sam told Rob about how family worked.
What the hell kind of worlds had everybody come from, anyway? Sam came from a place where it was okay to just be possessed by an angel, and this one? He came from a place where apparently he was so scared of being thrown away that he didn't even TRY to tell his family who he was?
Fuck everybody else's worlds, Dean thought. His was clearly one of the least insane. Jesus Christ.
The more Rob talked, though, the more he pissed Dean off. All Dean had done was tell him he'd have appreciated knowing sooner, since Rob had been around for several worlds now. Sure, he might've done that gruffly, but that's who he was.
He was right about one thing, though.
Grudges.
And what did Rob think would happen here based on all of this? What did he think he'd done, other than build a great case for Dean actually having a problem with him? It was a self-fulfilling prophecy at this point.
"Kid," Dean began, "you're talking to both of us like we've never been through shit like this before." His voice was calm. "That's insulting. Understanding has nothing to do with it. You know all the stories no matter what version of reality you're from, so how well has any of us withholding information from the family EVER gone well?"
He looked at Rob for an answer.
It hadn't.
John didn't tell them about their mom. That she was the hunter. He didn't tell Sam that he thought he was dangerous, and instead laid that on Dean as he said his goodbyes. Dean didn't tell Sam he sold his soul. Sam didn't tell Dean about Ruby... it all just kept fucking going.
"You're definitely a Winchester if you're pulling that bullshit. You wanna throw a tantrum and walk out of here, be my guest."