Most guys go after mediocre girls they know they can get it on with. The really hot girls that would make them happy get bypassed for the easy. They wind up with girls that don’t make them happy. A really beautiful woman is treated as "out of his league" and ignored as possible relationship material.
EVERY guy wants a hot supermodel quality, drop-dead gorgeous girl to come home to.
But, you know what? What works on an average looking girl works just as well on a beautiful girl. The only difference is that the beautiful girl had been hit on a bit more than the average girl, so you can’t come off like a "nice guy jerk" in order to meet her approval rating.
Most guys are so intimidated by hot looks that they back off and settle for what they perceive as "easy" and leave hot women alone. When really hot girl gets approached she usually gets it from the alpha male slick-line losers that completely turn her off.
You have to BELIEVE you DESERVE being with a beautiful woman and go for it.