That is surprising. I have really found B6 employees to be the most friendly and customer-focused in the air. I think your experience was unusual.

I will say that I think it is fairly common for the FA to address the parents as to what a small child should eat or drink - essentially giving the parent veto power. However, I have never known one to bark when the child answers.

In any event, if that is what happened, I think that you should write or call - and give the airline another try. That is certainly atypical of my experience.