I do agree that alot of children are being raised to be rude. I do not give my nieces and nephews presents for that exact reason but I do give my manicurist daughter things like a quilt because she appreciates it and thanks me.
OTOH, I dont think this girl was being rude, just honest. If she had received it as a gift, im sure she would have been polite but that's alot of work for polite so it is better to know now. I showed my GF one of my quilts, one that most people just love and she hated it. There is no accounting for taste.