Why are most feminist old? Did they get this way because they are past their primes?

The vast majority of so called feminists on here seem to be old hags past their primes. I guess once they reached the point where no man will pay them any attention they used the umbrella of feminism to whine and insult men. They don't even have the same principles or ideals as feminism as far as the social science of it. They just complain and nag about men and call it feminism.