Has your early environment made it ok to feel good about yourself?
Or have you adopted “their” attitude of picking on you and criticizing yourself? HAs it become second nature to think low of yourself?
For a week, say every day, “I love myself, I am love, I am being loved and I am loving; I deserve the best and I am ready to accept it now.” It might feel wrong, difficult or untrue, at first. Go on anyway. Train yourself back into your divine truth of Self.