Girlfriend of 5 months still talking bout her ex.....what to do?

First, she is obviously not over her long-lasting douche ex-bf. I don't think you can make him go away if she isn't ready to put him away. I would straight up have a talk with her about whether or not she still has feelings for this guy and if she does (i think she does since she got with you RIGHT AFTER) then it's best if you guys either break up or take a break. It's gonna hurt you in the long run since ur already fallign for her. & also, its effed up that she is comparing you and her douche ex. She needs to give you a chance since you guys only did it twice. & noooo 2 hours is not the average norm. If she is constantly dissatisfied it is not your problem , it's hers. i don't know what is so special in this girl if so far she does not sound like a keeper. Have a SERIOUS talk with her, see what's really up in this relationship. Good luck!