Not that there is any real point in responding to the allegations of bias...
Perceptions vary across the board...what seems right to me will seem wrong to someone else based on their own experiences, backgrounds.
To me the bias comes in the form of pettiness of which I see plenty of examples in this forum.
These characters are best known by the writers who write them...we are only reacting to what we connect with and what we don't connect with...simple disagreements can happen but to go the distance in labeling something a bias simply cuz you don't see it that way is where things get petty in my opinion.
Praising one character more does not automatically mean that a person is biased against the other character...