Yes, there are people that can get very sentimental and react sharply to failures and mistakes. It weighs them down a lot that they can't even concentrate on ways of improving and making amends from those mistakes but I don't think those people should even bother coming into Forex.
You know as a matter of fact forex trading works in accordance to our personal behavious and the way we attend to things. So therefore when someone is naturally that kind of person that picks corrections on mistakes then that person will however see mistake as a way to success.