Actually I don't claim that volleyball is purely man sport, but I also don't think that it's women sport. I claim that there are differences in men's and women's volleyball. And those differences could make some people to prefer one above the other.
When someone is arguing that much about overshadowing they are insecure. People are good in different areas and people should thrive to get better at what they want, not at what they think that they should be since someone is. Those arguments that men are overshadowing women were valid when for the same type of job even in the same company men got more money than women. I wouldn't say that now the difference is that big, nor I would say that men don't admit when woman is good in area where it's primary theirs. But men and women do strive in different type of jobs even. I'm not working in mostly men job because no one gives chance to women to work there. There are not that many women in this area (there are, just the percentage is lower) because women don't have interest in this. Many times when feminists are arguing about something, they come up with examples in areas where actually the women in general are less so it's normal that the examples of women succeeding will be less. And actually seriously what is the idea of those feminists? They want to be aggressive and competitive as men in sports? Because that requires testosterone. Now if they want more testosterone then I am not sure that they want to be women.
I don't claim that women having small break downs often is a bad thing, but in sport we need to be focused and all those small breakdowns shape the game differently. Like I said testosterone (main male hormone) + adrenaline equals aggression. Aggression in volleyball means powerful spikes. Just like in life if men are frustrated they show anger and aggression, not crying for long hours. It's biological. Estrogen (main female hormone) + adrenaline results in anxiousness and euphoria. Euphoria makes the brain to go overdrive which is anything but concentration. And yes there are women who have more testosterone (not like men, but more than what's normal for women) and they could be competitive as much as men, but those are the exceptions. Most women don't have enough testosterone to be competitive in sports in the way men are. So they need to be motivated differently.
Due to these biological differences between women and men there is no way the sport volleyball to be exactly alike for men and women. Yes they follow the same rules, but the whole dynamic is different.