Hi and welcome Kic;
I'm a parent and feel very sad when I hear such things have been said to a daughter/son. I want to say to you, their disappointment is more to do with them than it does you. Being young and making unpopular choices or not living up to others expectations, is part of being human. Your family know this too well from their own lives but sound as if they've forgotten.
It's also disappointing for me to hear parents are still struggling communicating with their children. There's so much information out there to help avoid causing hurt instead of opening up positive dialog.
Could I suggest you try asking questions from those who hurt your feelings, if they made mistakes or had difficult comments from loved ones to deal with when they were your age? When adults remember how hard their own teenage yrs were, they may come around to understand what their comments created within you and, might give you an opportunity to say how hurt you were when they told you they were disappointed.
Disclosing your feelings to family can be hard to begin with, but with practice, you might find some wonderful communication skills within yourself to take into your adulthood. Wishing you courage and strength...
Keep in touch and take care...I'm here for you.
Hugs...Sara xo
