Reality is objective - there is not such this as good or bad.

In the old days - chivalry and gentlemanly behaviour are considered to be good - but it also created a condescending outlook on women. Increased mortality rates as the world moves forward with numerous advancements in the medical sciences also mean we are suffering from overpopulation. You can say that the good of feminism displaced the good of chivalry and all the bad of a dense population - crime, income inequality, decrease of living space displaced the bad of low mortality. 

War kills a lot of people - but big spending for military purposes also led to various technological breakthroughs for civilian life. Nuclear power reactors will not have existed if not for the Manhattan Project - which was started as a response to the perceived threat of the Germans coming up with a nuclear bomb. Increasing food production - via advancements in farming technology also led to pollution due to use of chemical fertilizers. 

Everything has its good and its bad. How we choose which is which is merely a reflection of character. Someone will always be at the losing end. A winner only exists when there is a loser. The phrase win-win implies that the outcome is advantageous to both parties in a decision. But any mutual decision taken by any two parties will almost never exclusively impact only those two parties. The loser just not did not take part in the decision. Any type of subatomic particle will always have its own antiparticle, and any good thing has to have something bad that is related to it. Nobody is going to watch a superhero movie that does not have a villain.

A value cannot exist without having its own antivalue. Our perceived world is always at an equilibrium.