So the problem is 'declared' bias - undeclared bias is fine? Because Shukla was the definition of bias when he declared Tamboli the winner of that glass task - Jas was the clear winner there, and no stretch of the imagination justifies his gifting it to Tamboli.
Aside from that - I agree that the seniors should be unbiased and fair - but none of them have consistently been doing that. Gauhar is still better in that respect than the other two, but in any case - they're not about to start now.
Of course every form of bias is not expected. But when it’s declared, that definitely makes the situation worse. While in some decisions we don’t agree with a senior, that always doesn’t mean a bias.