Cyrus - A Review

So I just finished watching Cyrus, starring John C Reilly, Jonah Hill, and Marissa Tomei. Great cast, right? The conceit is easy enough to size up; a man meets a woman he connects with, they start to get serious but she's hiding something... her son Cyrus. He's close to his mother in a way that feels... odd. We don't really know why it's weird but the film makes it clear for us. If you looked at this one and thought you knew how it ended, you're right. If you thought the journey would be insightful and emotional; about how a son and mother could get so close that the son would go out of his way to psychotically and systematically destroy his mother's happiness with another man; if you thought there would be any reason why a man wouldn't tell his girlfriend the incredibly creepy things her son said to him, in this movie, you'd be wrong. You'd be wrong on all counts. And that's unfortunate because this is fertile ground to explore the dysfunctional relationships of adult parents and children in the wake of divorce. What happens when the abandoned child gets older? How do the dynamics change? What happens when a mother is single for a decade and starts dating, finally, after all that Time alone with the now adult child? This movie is concerned with none of this. Instead it explores, and superficially at that, the relationship between the new boyfriend and the jilted (?) son. It all boils down to a mildly entertaining farce during which I had to keep forgiving the ridiculous choices of the characters until it all gets wrapped up in a very unsatisfying bow. And roll credits.
The writing is good, if light handed. The story is interesting, if unexplored. The acting is beyond reproach; look at the stellar cast! Reilly, Hill, Tomei! They all did a great job with a script in which they must've seen a lot of potential. Sadly, that potential is not reached.
I wanted to like this movie. I think Jonah Hill is so promising, moreso after seeing this because he expands his range, but I was disappointed by the writing. This movie offered no insight into the central idea.
What would happen if, after a decade of co-dependence, your mother started dating and you weren't ready? I'm not looking for a Freudian tutorial but I'd at least like my intelligence to be respected.

The DVD is currently available. Feel free to tell me what you think.