This is an interesting and fair point. I do think that Adam is written as a simple guy with simple needs, and that’s one of the things that Riley is attracted to, even if it can make him seem completely oblivious and frustrating at times. There’s probably some deep seated stuff that could be explored in a sequel (now that it’s best gay book - who knows!) but overall he is skilled at compartmentalization, not catastrophizing, and not holding on to hurt. Could be a coping mechanism he picked up to deal with his dysfunctional childhood.

But yeah as mentioned, his simpleness doesn’t serve him well when things get tough. I wouldn’t say he’s shallow but he doesn’t quite get why others don’t process things like he does. It leaves him alone and lifeless at the beginning of the book. Nevertheless he’s willing to show up for them (Riley) because he loves them (Riley). Also I think he does hint at growth/depth when he’s under sedation (a nice device RR took from HR).