having heard all the academic arguments and absurd over-interpretations of themes that aren't really visible or there at all
I'm sure there's plenty of absurd navel-gazing about its thematic content but blind Freddie would agree that it is replete with relations to ideas of mortality, identity, self, consciousness, memory, pain, family etc., not to mention the religious side. I mean that's practically all it is, a giant thematic hammer.
I can appreciate that over-exposure to it in an academic setting could have sucked the joy entirely out of what was, for you, already a somewhat underwhelming experience.