Why would someone in the position of Teacher or Advisor give an over-the-top harsh critique of a gifted writer – seeking to improve upon their obvious gift?

Is it believed that crushing someone (who is likely more talented than the critic) is somehow helpful, making them fight back and try harder?

Or is it just a display of jealousy.

This happened to an amazing writer that I proudly consider a friend.

She seems to be hurting from the opinion of one person who does not deserve the power to yield that affect on her.

I never sought to write (it could be argued that I don’t) nor expect it to go anywhere, so a critical attack on me or something that I’ve written might roll off my back with a grin and a middle finger – making me of little value in helping her.

How do you help a writer who has been damaged by hearing someone that they shouldn’t have?