This app does not portray a whole lot of being scared. You are overreacting. All it does is it shows Little Sister resisting going to the potty at first which is normal behavior for any child. It validates what other children experience and shows to them that eventually they will find out there is nothing to worry about. Books cannot only show how a perfect situation should work out, that might make a child feel miserable because he or she will think that only he/she feels afraid and there is something wrong with their feelings. I suppose you expect a book of this sort: Little Sister got a potty. She was super excited about it. She sat on it and did everything right from the first time. Goodbye diapers.
Sorry, you should look in the Barbie section for books like that.