I agree, and I don't think it's petty or silly to ask for accurate representation. They easily could have given him some other struggle, but they went with this. It's frustrating for them to have chosen to give him a stutter but then rather than approach that in a respectable and realistic way, they decided to do this old outdated trope of "he became more confident and now he can speak fluently!" It's so overplayed and definitely isn't good representation.