I think you two are being petty and unfair. Coach Mulkey is a tough, hard competitive person but she is not a horrid person. she has been a credit to her gender, profession and sport.
When Mulkey was younger, her father cheated on her mother, later divorced her, and eventually married a younger woman. This made Kim Mulkey so angry that she never forgave him, and hasn't even spoken to him in close to 40 years. He's 87 years old now, and despite very much wanting to speak to his daughter, she still won't forgive him. She apparently hasn't spoken to her sister in decades, either.
Anybody who holds grudges that deeply, that harshly, and for that long,
may be a bit of a horrid person.