While I still think it was an alright movie, I do agree with you, the ending was very weak, which is why it was probably so depressing, especially given his previous works. The third chapter in total was maybe 10 minutes which were spent telling how much his job and life sucks and how much better the chicks life is at this point and then it abruptly ends. I'm sure I wasn't the only one with the reaction of "thats it? Am I missing something?". All of the characters development and building up of their relationship seemed for nothing, making the movie feel pointless.