Maybe she was and still is feeling awkward because she died and the party had to carry her? Are you sure someone on the party didn't say something like "you suck" or "dying AGAIN?" to be saying it 'stings' now?
Well, a lot of people complain about others doing low dps, dungeons taking 30 minutes (really? NO, REALLY?), healers not dpsing (including me, and sorry not sorry, I won't dps after getting home at 12:00 p.m. from 6 hours of work, on roulettes I don't even have fun doing), players not dodging etc.
Personally I don't care, if you have a good attitude, I'll stick with you until the end of the content. I never rage-quitted outside of the three times I knew I wasn't ready for that content, may it be because I was tired or because I had taken medications.
So you won't (like, EVER) see me ragequit because someone is "bad". I'm not on the other side of the screen to know what the other players are going through, if they're playing to get their head off of their problems or if they are not feeling well, maybe they learn slower, maybe their reaction time is not on par with yours so if I'm capable of playing the game with more ease than my fellow players, I feel obliged to adjust my playstyle to match theirs, because they pay the same amount I pay and they deserve to play as much as I do.