On the average, our government would have made better decisions over the last almost 100 years if the 19th Amendment hadn't passed. It might be too late to make a difference now if it were repealed. but if it were never passed that would be good.
Everybody claims to agree with democracy, but then calls foul when the result doesn't agree with them. The criteria for evaluating a system of government should be the quality and efficiency of decisions. Representation is an illusion anyways and is at best a means unto an end. In other words, letting people fill in circles on a sheet of paper (or pull levers or pierce chads) doesn't make their life better on its own. Life only becomes better if the collective outcome of those voting actions over a long period of time lead to better government. The 19th amendment has not achieved that.
Lest it be interpreted that I am implying women made bad decisions, I don't agree with that. Women make good decisions for themselves (as do men). The problem is that the stackup of economics, culture, and biology means that women voting in their individual self interests leads to a result that isn't good for civilization as a whole. Allowing women to vote is what really institutionalized the welfare state and is the force that will cause us to eventually run out of other people's money.
Men's self interest is collectively a government of a certain balanced size. Generally, women's self interest (and particularly single women) is to continuously make government bigger and bigger. They don't have any particular interest in making government smaller. Thus, allowing women to vote has insured that government will continuously get bigger until we run out of other people's money. As I said, it's clearly too late to reasonably expect a repeal and probably too late to make a difference even if a repeal were possible.