Very generally said, three things that victims of being bullied do:
1: Never go back to where it happened, moved away, never meet/speak to the people who did it to them.
2: Seek out revenge, this often never happens as the victim is so destroyed that they are scared or become mentally ill.
Yes a very basic list and very short list.
So Drumpf is clearly doing the two first two after Seth Meyers Roasts Donald Trump – White House Correspondents Dinner – https://www.youtube.com/watch?v=h87sVIDzqBM (10:30 in)