Why not cheer Serena Williams?

I wonder why majority of men (Indians, don’t know about foreigners) don’t like the Williams sisters (Venus and Serena), especially Serena. In every match she plays, irrespective of the opponent, I see people supporting and cheering her opponent. Even when she wins, people don’t appreciate her. They rather sympathize with her opponent. I think it is because we all have a soft corner for white skin (fair skin in the Indian context). We find every white woman attractive, don’t we? If Serena is such a bad looking woman, she wouldn’t be a fashion icon in the US. Another reason I think why we don’t like her is because she is bulky, strong and muscular. I guess men develop some complex and feel little insecure when they see a really strong woman. With all these biases in mind, we simply ignore the fact she won 12 singles, 11 doubles and 2 mixed doubles Grand Slam championships. We should at least respect, if not idolize, the great champion that she is.