@Kamikaze
I agree with you and this kind of attitude is not only limited to the medical professional; it is amongst all industries. Even I never questioned my boss in front of the clients when the boss is wrong; I asked it later on when the client is no longer with us. Doing so will make clients think there is no synchronisation within the company; which will further make the clients distrust us.
Ishani is insubordinate; and insurbodination to this level is breaking the rules that she holds so high and dear ṭi her heart. Dr. Sid might have let that go; that's because he is not so strict a boss. Other boss might not be as lenient as Dr. Sid; and she needs to understand that she is working with people. If she wants to have a boss like Dr. Sid so much; she should return to his team already.
Also, I disagree with having bad childhood as justifications for her behaviours. Many people have bad childhoods; it doesn't justify nor give them excuse to do whatever they want and act full on attitude. There are also many people who have bad childhood and still know how to respect others and treat others with decorum. Dr. Sid had a bad childhood being a fatherless son and illegitimate; yet, he is loved by everybody except Vardhan and maybe Dr. Anjali. Just saying dude.