I think one of the MANY crimes of SPN was reintroducing Adam in the last season just to give him nothing new, but also somehow forget his main character drive,
The first few things you see him do is eat junk food and talk about college, two things we already knew about him. and then not much else is revealed about him or he doesn't really talk about anything about himself. just talking to Michael
And they also forgot that the only reason he did all of that was for his mom and when he got out of hell that was never mentioned, Adam's main motive for saying yes to Michael.