I dont think theres anything wrong with raising an issue if you have a problem. With Salman, I did not like the sucking up either but from what I can see, rubina is a Salman fan and she doesnt want to hurt him because it will look bad. The disappointment is clear in her eyes though, Salman is not what she thoguht and she clearly had high opinions of BB and Salman.
I think rubina just needs to become stronger and stand to Salman because she clearly gets affected by his comments.