You know, I think we can use a better common ground to analyse this.
Let's look at the Super Mario Bros universe!
Within out sorce study, we have two protagonists, Mario and Luigi.
Mario represents the jerk. His pushy nature means that he insists on going first, as shown by player 1 always being mario in many of the games. He also uses physical strength to over come most challenges, much like a bully who throws his weight around more than he should. Finaly, his token color is red, an aggressive color associated with rage.
Luigi is our nice guy. He is polite enough to wait and go second, often being player 2. He also jumps higher than his brother, as symbolism for quietly reaching for greater heights without imposing himself on others. His token color is green, a color associated with peace and nature.
So, what one gets the girl? Well they both do! But they treat their relationships differently. Mario, being the loud jerk that he is, flaunts his 'prize girlfriend' peach around to make others jealous. He sees her an an object to be rescued and won, and as such displays his trophy when ever possible.
Luigi, being more humble, has a quieter relationship with Daisy. They don't go out of their way to make it blatantly clear that they are a couple, instead choosing to keep things romantic by spending more time with only each other. They will often sneak away from the table to sit and talk in a quiet place.
As such, it might appear that the jerk always gets the girl, because when the nice guy gets the girl, he dosn't telegraph it to the world in a display of victory, he just enjoys the relationship!
/blatant parody.