Where’s your argument? The only point you make to establish “overall upset ex-wife or girlfriend” is one of tradition. C’mon, Shea, this seems lazy.
Amy is the hands-down winner. While Alex boils bunnies and makes inappropriate gestures to worm her way into Michael Douglas’s fictional life, Amy hits Nick where it really hurts. She sends him on a scavenger hunt as a distraction, turns the law against him, and not only messes with him, but also kills a different ex in Neil Patrick Harris. She’s much crazier, and better developed as a character than Alex. It’s also much more deadly to deal with your crazy, bitter spouse than with a poorly chosen one-night stand.