My guess is the youth groups reflect the church they are from.
"According to a new five-week, three-question national survey sponsored by the National Center for Family-Integrated Churches (NCFIC), the youth group itself is the problem. Fifty-five percent of American Christians are concerned with modern youth ministry because it’s too shallow and too entertainment-focused, resulting in an inability to train mature believers. But even if church youth groups had the gravitas of Dallas Theological Seminary, 36 percent of today’s believers are convinced youth groups themselves are not even biblical……
……..“Today’s church has created peer dependency,” McManus says. “The inherent result of youth groups is that teenagers in the church are focused on their peers, not their parents or their pastors. It’s a foreign sociology that leads to immaturity, a greater likelihood of sexual activity, drug experimentation and a rejection of the authority of the Word of God. "