How long does it take to learn lesson?

Seriously, Sadhna is getting on my nerves, I mean come on, how long will it take for her to learn lesson that always being nice is not good. sometime u have to be bad to teach someone a lesson. How she lost the competition she was being dumb, I mean ragini already feel sadhna have hurt her, so you rather hurt her more and win the competiton and save ur marriage and ur mamiji's life. MAKE SADHNA STRONG SO SHE CAN STAND FOR HERSELF!!!!!!!!