Not for this? Well shut up

Someone said I am not for this field because I'm better with the other way I think, why do they know more about myself than I do? How do they comment like they ever know me? Because that was just phrases but it stings, it's painful that I don't know why I have to bear with it. Real thing is that I still don't know. I am just escaping with the thought that I don't have any goal for my future, because that's shameful.