I think there are two different realities that fit the evidence we've been presented with equally well. One is unacceptable -- and she's well within her rights to complain; the other is acceptable -- and she's making too much of the issue.

It's not beyond the realms of possibility that the following is the case:

  The men "hitting on" her are perfectly polite and 
  interested in her professionally, but also want to see if 
  there's a chance of a date.  If she were to reply, "sorry 
  no", they would leave it at that.

If that reality is the case, her comments are completely unwarranted. She hasn't presented any evidence that excludes that reality, therefore she comes across as whining.