Please don't give up, to cheer you up and let you know you are doing well, this is what Pippin does. So Pippin, who ive had for nearly 3 months, doesn't like my hand at all she runs away even when I put it next to her on the cage. She will have days where she will let me though. She shakes when I talk to her she doesn't come out of her cage (except her adventure the other day) I've tried everything. She will let me feed her millet but my hand cannot be anywhere near her, she will not come to the millet I have to bring the millet to her. I would be really happy if she let me put my hand next to her so she can bite it!
Henry is a food hog and loves the millet so jumps on my hand for it and I've had him 2 and half weeks but if I don't have millet he is still shy and scared of my hand but no where near Pippin! Tis a good example of what people have said about every budgie being different.
lots of good advice here, e-books and videos from a bird taming pro: goodbirdinc.com
the basic video on bird taming/what to do about biting/aggression towards hands is really excellent. you are right to move your hand away for a few seconds when they show any sign of aggression; the bird quickly realizes aggression= the treats go away! the trainer calls this "a time out."