You should def say something to her on Monday. Tell her exactly those examples and how you felt then. What can you really lose? Either she changes or you walk. I know you said you are shy about these things but you also said it‘s your dream job, so fight for it. If you just quit the job you might put the next person in a similiar situation there and nothing will ever change. As I work in HR I always ask people why they leave the job and many times it‘s about bad communication or no communication at all. If she doesn‘t change her behavior after the talk you can still go to HR and complain. But it‘s best if you have that first talk on your own with her.