I've met very attractive women who were frustrated because they felt like they had the worst of both worlds. What hurts more is that no one will feel sorry for them (like how no one feels sorry for rich people).
They'd get approached a lot by arrogant guys flaunting their looks, money, status, etc. Treat her more like a trophy than a person. Big house + sports car + model-quality girlfriend. She was just another acquisition for his collection of status symbols.
They would not get approached by normal guys. "She's out of my league," "She gets creeps approaching her every day, I'd just be another one," etc. and talk themselves out of talking to her. Or if these guys do approach, they end up being overly fawning, awkward and make her uncomfortable.
So girls like that attract both extremes. Treated like property or like a goddess. Neither of which they wanted. After a while I think some of them develop a hard shell and just shut down all who approach, as a defense mechanism. Problem is they eliminate the good as well as the bad. That why I try not to be too stung if a really hot girl blows me off. That's probably her default reaction by that point.
Adding to that, they would see their less attractive, but still cute friends get into good relationships with caring boyfriends. "Why can't I have that, what's wrong with me?" they ask themselves. Some of them started to believe they themselves were ugly. "If I was pretty, I'd have guys talking to me or be in a relationship."
This is especially true if they weren't attractive when they were younger and never accepted their newfound beauty. They don't realize they've changed and blossomed. They didn't get attention when they were younger because they weren't attractive enough; but now it's the opposite and they don't get approached because they're too attractive.
Ironically, in my experience it was the cute (not stunning) yet "attainable"-looking girls that were most likely to already have a boyfriend, or a ton of potential suitors. The ones who knew how to flirt, listen, laugh and flatter guys. Who knew how to charm.
Guys would be captivated by them yet believe they had a chance with girls like that. I've seen objectively hotter women be baffled and jealous at how these cute girls would just run circles around them at attracting attention from guys. Charm is the girl version of game for guys.
The really gorgeous girls, there was a chance they were single. Most guys talked themselves out of approaching at all. Some of those girls seem cheered up that I would say hello and talk to them like a normal person.
On a side note, a lot of them seemed to yearn to make more friends (unless they were already social butterflies). They had a hard time making friends with girls, because other girls were jealous of their beauty and hated them. Girls didn't want their boyfriends/husbands to meet them either. While guys only wanted to hook up with them. I was surprised at how lonely some of them were.
Even taking the initiative and proactively giving their phone numbers to guys they were interested in, didn't always work. Some beautiful girls would struggle to get guys to call back. Mostly because guys thought they were too good to be true.
"There's no way she's interested in me. I'm just imagining it."
"I bet it's not even her real number. She probably gives out fake numbers all the time just to get guys to go away."
"Maybe she's crazy. Girls that hot only go for celebrities/rock stars/pro athletes/[insert alpha male]."
Everyone's got their struggles.