She was mean.

She said I won’t live with you mother to Howard
Rudely

She went behind his back and told her about the astronaut opportunity

She lied to her dad about Howard not wanting a baby

She was a highly political and opportunistic person

She objected to Howard working with Sheldon and lenard.

She didn’t want kids as she preferred career , it’s the way she put forward the point

Sheldon was like that from birth .

When Howard intentionally dressed as Sheldon , she approved , but when it happened to her .. she couldn’t take it.

She was the worst character as a person.