It is rude to ignore someone's efforts to improve themselves.
Janine is on a diet to lose weight and get healthy.
Grayson wants to encourage her to keep at it.
Grayson compliments Janine on her progress.
Grayson points out ways Janine could still improve and calls her out any time she slips up on her diet.
Janine feels like her efforts are working and feels motivated to keep going.
Janine feels humiliated and like Grayson is policing her.