Girls that seem more sophisticated then the general crowd will be more intimidating to most men, yes. Couple that with (what many men might perceive as) an over-confident attitude, and most men will simply go for an easier target; one they perceive as easier to approach and less likely to reject them.
Guys will appreciate your outfits and confidence once you are WITH them, but they tend to approach girls who are more casual and easy-going and who they perceive as less likely to blow them off or publically humiliate them. It sounds like you are coming off as a "sophisiticated ice queen" to them, and they figure that they can't compete with the guys they imagine you are attracted to, so why bother?
Only the super-confident "rock star" types will usually go for that kind of girl, and those guys are players who are just looking for a pump and dump in most cases.
doesn't really matter how you dress. its how you come off as a person, your demeanor. if you don't smile seem like a very grouchy bitchy type nobodies even going to attempt to try to climb that mountain. break through the wall etc etc