The KJV is much more accurate here. Compare it to the NASB.
(Proverbs 30:11 NAS77) There is a kind of man who curses his father, And does not bless his mother.Notice that instead of “kind (1755) of man” it has “generation” (1755). The Hebrew word appears 137 times and in both translations it is translated “generation” over 130 times. Also note that it is repeated in the next three verses.
Doesn’t this sound familiar? “Kids these days!” We tend to blow that off and say that adults have always been complaining about adolescents. That is true. What is also true is that there are some generations that excel and others that don’t measure up.
Who is responsible? If you look through Proverbs, lax parents tend to make the problem worse. At the same time, nowhere in the Bible is someone else responsible for the decisions you make.
So? Be the best parents you can be. If you don’t have children, be the best influence you can be. But remember that you are responsible for your soul and they are responsible for theirs. The only lawyer we will have at the resurrection will be Jesus.