What I learned from watching this movie
Women are irrational miserable people who attach themselves to men for the sole purpose of working out those feelings through making them miserable and trying to change them.
Men are rationale but dumb, self absorbed, and ultimately will deal with anything women throw their way as long as they can get some pussy.
All relationships are bound to fail.
This movie was beyond realistic, even cynical, to the point of depressing. It also played on several gender stereotypes and did so in an obnoxious way. It did a major disservice to the first two movies.