What do you think prevents people from always acting in accordance with the golden rule of morality?

The reasons for this lie directly in each individual person. Someone did not receive proper education in childhood and does not want to be brought up himself, and someone is disappointed in people, and therefore ceased to follow any moral rules altogether. There are many reasons, but the problem remains. And its solution lies in an individual approach to each person. You can find a solution to the problem only by considering a particular situation in particular.