It would definitely have to change. A good rivalry should be evenly matched. Both characters trading barbs, throwing shade in a confrontation where each character is on even ground during the verbal sparring.
Like a good tennis match
Instead, we get Carly returning all of Nina's serves with the force of a meteor going straight through her racket. Like this
Not fun to watch. And it's the reason I started to root for Nina. I would not say I'm a Nina fan but she is the underdog and the treatment she has received and constantly being beat down is just poor writing. This woman is intelligent and educated. But you would not know it. You can't have her being a bitch one minute and then groveling the next.
She has millions of dollars. Let her start up her own magazine and crush Crimson.