Right, the belief that sex is an achievement is harmful to men. What if a man gets raped by a woman? Would sex be a achievement then? Absolutely not. People like Elliot Rodger didn't kill people because he hated women. He did it because he hated other men. He thought they were of a higher status than him because he was a virgin. I'm sure he was made to feel that way because of how society treats male virgins and expects men to be overly sexual.
Beliefs like men need to have sex to be "real men", be dominant, can't show emotion, etc. all contribute to sexual violence. When men feel they can't show emotion, lack the "skills" to get laid, and lack support for abuse then they'll try to find their manhood through other means like violence. If we want a better society, we need to change what it means to be a man and stop promoting these harmful beliefs. Let people decide what being a man or woman means to them. I don't like it when people try to tell me how to be a man.