I hereby interrupt the upvote memes to tell you about my very favorite piece of terrible screenwriting in the movie

It's the last scene, where Tommy gets confused because we're supposed to hate Claudette and has Johnny say "you and your stupid mother" right when we're supposed to be most sympathetic to him, even though Claudette has been nothing but nice to him for the entire movie and keeps telling Lisa how great he is and how lucky she is to have him.