Full disclosure: I actually watched this one about a month ago. I was going to rewatch it for this, but I'm too busy with other stuff this week.
Luckily(?) I was already spoiled beforehand anyway, so at least I don't have to worry about not noticing all the foreshadowing. As far as I can tell, just about everything that happens is the old janitor fantasizing about how his life could have gone better? And also he's trying to decide if he should kill himself? Most of the movie seems to follows dream logic, which kind of made it hard for me to care much about what was happening. (It'd probably be different if I hadn't already known the girl wasn't real but that spoiler made it obvious that none of this was "real".) I do like the ideas, it'sjust hard to love a movie when you don't care about any of the characters. One thing I do love: Assuming Jake is the janitor's idealized version of his younger self, it's interesting that he's kind of a jerk whose girlfriend doesn't seem to like him much. It says a lot that even his perfect fantasy self is a screw-up.