All of us have had problems at one time or another. What matters is what you did to overcome them. Most pilots don't really care who is sitting next to them just so long as they can get Long with them (exceptions should be made for some very precious people though). Also, it is impossible to get on with everybody in life and you can't expect everybody to give you a glowing reference. The bits of paper she carries make her as eligible as the next candidate.
So the questions are, how old is your daughter and how well does she handle herself with other people? If she is young, maturity will help. If she is a little shy, maybe she should get a job where she is in front of difficult people - until she joins an airline. There are also various courses that will help you develop yourself.
Overall though, the most difficult thing is getting your first job. The toughest hurdles to cross are normally thise raised by the miserable scrotters in Human Remains. I'm convinced these departments would function better if there no employees and no recruitement. That aside, she will get her first job, and afer a few years she will see how the world of aviation works and then she will be ready for her next step; whatever that is.
I wish her the best of luck,
PM