The way I see it, it's a victory for all the "nice" guys out there. Relationships are about caring/loving the other party and most importantly, being patient. He invested time and effort in this girl and in return he got his reward. You treated her as just some kind of a fling and she did the same to you. As everyone has said, you are just jealous and can't deal with the fact that she's not yours.
Also, you have no right to call her "tool food" or "sloppy seconds". Society has regarded girls who fuck around as sluts or damaged goods. Whereas, guys who do the same are manly and cool. This double standard is one of the most ridiculous societal norms that we have but you have every right to think this way because society has told you so. However, take a step back and look at the big picture. In a world where we talk about equality for all, regardless of race or sex, what makes men so much more superior to women such that men can screw around and its ok, but when girls do it, its not? Think about it...
Reading about the way you try and convince your friend that her fiance isn't the right type is really disgusting. Why can't you just be happy for others? And things aren't what they always seem on the surface. You may think you know her well, but people change and as time moves on, people mature and realize that stable and faithful relationship/marriage is more important than just simple, fun one night stands. Clearly, your mentality is still wrapped around having fun and getting laid. That thinking is perfectly fine. But all I ask is for you to have an open mind; to be able to think about things from other perspectives and not blindly impose your one-sided opinions on others.
Also, I don't see where god fit into this whole picture and your misogynistic, sexist one-sided opinions are not always right. In fact, I would say that they are very close-minded, immature and disgusting. Of course, you are entitled to your own opinions and so do I.
I know many guys on this forum do not share the same sentiment as I do regarding how to deal with the opposite gender, but that's what these places are for. So enjoy!