Really two different questions.
Of Luther himself, clearly yes. Of the confessions, not something I would consider flat-out wrong. Or the way the LCMS understands the confessions, not really.
My criticism of the modern Lutheran Church is more in the area of practice. We don’t encourage private confession enough. Some Lutherans have shown a callous disregard and irreverence in the way they handle the reliquae after the sacramental act. I am fearful of a gradual swerve into Protestantism, in that some tend to act Reformed, some want our worship to appear more mega-church.
On here I often speak of the things that would have to happen for me to come to communion with the Bishop of Rome (or Orthodoxy). I don’t often mention that, while these things could draw me in, there is also the possibility that Lutheranism, even the LCMS, could push me out.
Jon