Mel tries hard to act like a sensible, rational adult, but her immaturity often slips when she is pressed on something she has brought up. It is exhausting. STOP TALKING IN CIRCLES
I just realized what's happening. She's jealous of him. He has everything she wants and he's regarded the way that she would like to be regarded. He has a doctorate. He's considered an intellectual. He's able to joke but still be taken seriously. And he's respected on other mediums.
Mel wanted marc to be on her side so bad that when he started shooting at her, she didnt know how to take it. She felt she had a friend in marc no matter what she said or did, marc realized after that mel was not genuine in her takes and was only one sided