Friends and couples quarrel and want to break up. How to convince them?

You should stand in your position first, because they are your friends, and one purpose is to "make peace for the children"

Now this social atmosphere has been like this. After 80 s and 90 s, I still can't really understand what responsibility is.

You should help them analyze these things from a rational point of view and stand in the middle as a "peacemaker"

Don't go too far, grasp the scale and give them a step down.

Finally, I wish you and your friends a happy family and good health.