Unlike Ceejzor (who decided to speak on behalf of everyone) I liked it.
I don't know what was so "unsatisfying" about it, either. It wrapped up nicely.
I take it that he's the type of person who's disappointed if there's no shootouts, or if the main character lives and/or gets the girl in the end...all of which apply to this film.
Rossi finally learned to stand up for himself (plus made his relationship with Bernie public), Sam (who deserved to die) died, Bernie got her money back and Lila was arrested. How is that not satisfying?
It's fine if he finds it unsatisfying, but if you're going to be obnoxious and speak on behalf of others...at least be more clear.