Wow, what a massive opportunity for personal growth Korina has after being on Project Runway! It is actually a rare gift for people to get an opportunity like this to see themselves through other people's eyes. We should all be so lucky!
If she can use this experience wisely, she can attempt to grow beyond her current emotional/spiritual "level of being." Korina isn't a bad person, she just needs to develop more awareness about and compassion for the feelings of others. I wouldn't be surprised if Korina saw this behavior from one (or both) of her parental figures during her childhood - constantly blaming others and the "outside world" for their own inner shortcomings/challenges. I was raised under these sorts of circumstances, myself, and it took me quite a few years into my adulthood to develop beyond these personal limitations.
At this point Korina is indeed immature and self-centered. But very few people get to see themselves, objectively, under such a bright spotlight. I truly hope she takes advantage of this opportunity to "grow up." Cheers.