Possible meanings are 1) "young people have become their leaders and they oppress the people" or 2) "their leaders are immature like children and oppress the people." (See: [[rc://en/ta/man/jit/figs-metaphor]])
It was common in the Ancient Middle East to speak of a nation's leaders as if they were shepherds. As shepherds lead the sheep along good paths to safety, leaders should teach the people the truth and help them do what is right. Judah's leaders were not doing this. Alternate translation: "your leaders are like bad shepherds who lead you away from good paths and do not show you where to go" (See: [[rc://en/ta/man/jit/figs-metaphor]])