Yeah, but I believe that others should change

In your childhood years your behaviour was subject of almost continuous correction, and this input was the basis for your young personality to adjust its behaviour in a way that it hoped it would be in the least amount of trouble. So it is very likely that you started to believe that correction is the way to deal with unwanted behaviour of other people, because that is what you were taught all the time. An important message that it contained, was that when things did not go the way someone intended, this automatically included the "fact" that the person who did not meet the expectations was the one to change. With a bit of luck you reinforced this pattern on yourself when you started having kids of your own. Managerial functions have the same potential to make you believe that it is true.

The simple fact that you learned this, does not mean that it is a truth in itself, even though it is a very widespread one. It is a pattern that can be monitored in all kinds of relations: when something does not meet your expectations, you expect the other person to change and live up to them. This includes the smallest of things, like the other person not looking too happy. And when he acts that way, you are very willing to take up a somewhat threatening pose, like the ones that used to work so well for you, until the other person changes his behaviour. You will even have a series of punishments just in case this should not work immediately, like walking away, shouting, throwing, denying, silence etc.

Now what would your world look like when everybody who noticed unwanted behaviour in someone else would look in himself first and find the origin of the label he just laid on the other person, and started trusting his or her inner wisdom. Because every judgment originates from the idea that a personality can compare a perception with a standard and that the result is a truth in itself. You may help yourself here by asking the question "what use is this?" It is likely that at first you will hear all kind of "altruistic" motives like "prevent the other person from making mistakes", "make sure that he does not make a fool of himself", "in this way it is not very nice", which are all hidden ways to make your values and standards true for the other person involved.