your "special snowflake syndrome" sounds like it might be related to a phemonemon I've dubbed "pretty girl syndrome". It's just that "pretty girl syndrome" goes further in explaining the cause.
"Pretty Girl Syndrome" is basically a condition of social laziness brought about by all the attention that comes from being a pretty girl. Pretty women are socialized differently from everyone else. They get people coming up to them and approaching them all the time.
Because of this, they don't experience as much pressure to push outside their comfort zone and learn to approach others. The reason why is that they get approached so much that other people basically do all the work for them.
As a result, they are more likely to choose their friends from among those who are approaching them, and less likely to choose friends who they themselves have approached (because they rarely approach anybody).
But who are these people approaching the pretty girls? Well, they are predominantly men - men who are drawn in by her beauty. So, these girls are picking their friends mostly from among the men that come up to her, and the result is that their circle of friends will be made up almost exclusively of men.
Not only that, but the men she makes friends with are likely to be a lot more forgiving than the women. Most friends expect you to call them just as much as they call you, or invite them out as often as they invite you. Most people will dump a friend who never initiates contact and always just waits for you to come to them first. However, the men who approach pretty women and who get chosen as friends by pretty women, are much more likely to be forgiving of these things, because they want to keep associating with such a beautiful girl. The female friends of these girls with "pretty girl syndrome" are more likely to stop coming around if she isn't carrying her weight in the friendship, but the men who are enamored with her beauty will likely keep calling and keep inviting her out no matter how rarely she returns the favor.
The thing is though, all of this is normal to a pretty girl. She's never experienced anything different. She doesn't realize that she's receiving such vastly different treatment compared to men or less attractive women. All she knows is that somehow guys are easier to meet and easier to keep as friends, than girls are.
So, these are girls who are likely to say "Oh I get along with men so much better than women! Guys are just easier, you know? They're more straightforward, they don't play stupid games, they just say what they mean, but women gossip so much and play games and are too complicated! I have so much more in common with guys than I do with girls!" And they think that they are saying something positive about themselves for getting along better with guys - that they are more down to earth or something - when the reality is that they get along better with men simply because the men are treating them differently due to their beautiful looks. But because they don't fully realize this, they explain their predominantly male circle of friends to themselves in this way.
And because I managed to offend someone thoroughly the last time I tried to explain this concept, I have to put in an obvious disclaimer - not every attractive woman has "pretty girl syndrome". It's just one possible response to being constantly fawned over by men, but certainly not all beautiful women fall into this trap.