I'm tired of people not knowing the difference between constructive and plain criticism. They are both used in everyday life. One is beneficial. One is unneeded. People need to learn which one to use.
An example of constructive criticism, the one people should use and the one that shouldn't have to be explained but I'll do so anyway because people still don't seem to understand it, would be: "maybe you can try ______ next time and see if it helps."
This allows for the person being 'criticized' to take a different look at what they're doing without being yelled at, mocked or worse. In the end, everyone is still calm and life goes on.
Plain criticism is where the individual criticizing gives no suggestions (not being constructive) and often does it to be rude. An example of plain criticism would be: "you look awful with black hair."
This provides no suggestion to the one being critiqued and instead is just a way for the individual critiquing to be rude about something they don't like.
To turn it constructive, the person giving the critique could easily say: "I think you would look good with blonde hair, maybe you can try it."
This changes the tone of the criticism from being flat out rude to something the one being critiqued can actually think about without being made fun of or yelled at.
People would get along a lot better if they were nice about things they think other people can change. There is no need for the rudeness that comes out of it and those who criticize without offering suggestions should not be listened to. They felt the need to criticize (which can sometimes be helpful), so they can offer some help for better results.
Let's, as a human race, become nicer. It's not that difficult.