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Another thing to add about the purgatory thing is
Sam didn’t know Dean or Castiel were in purgatory (who just thinks that when someone explodes they go to purgatory and not death??)
his surrogate father is dead (who was the one with information but all that’s gone now since the house was burned to the ground)
he lost basically everyone, and was still going through the aftermath of the hell stuff
Dean makes no sense, the fandom who supports him make no sense
“You should have looked for me while I was in purgatory”
aka: it’s ok when Dean does it, but when Sam is his own agent he’s always in the wrong