Drew, I am so sorry this all happened. I know all too well what it feels like to be caught in between a spouse and a teen or adult child - including physical fights. It’s awful.
Your daughter may have been out of control, but what your wife did was abusive. As parents and adults, we have to be able to maintain our composure and not escalate the situation when our children are out of control. Even if we have issues of our own. I can’t melt down even when my kids are pushing all my Aspie buttons. Because I’m the mom. And I can’t expect them to handle their $#&@ if I cant handle mine.
That said, I know you can’t control your wife any more than you can control your daughter. It’s a terrible place, to be in the middle of this kind of ugly scene, and to be put in the position of trying to be the peacemaker.
I would agree with your daughter than your wife needs a counselor. It would probably be helpful for the two of you to see a family counselor together to agree on some strategies you can both use with your daughter. But if she won’t agree to that, it may be helpful for you to go yourself to get some perspectives on everything.
Cutting your daughter’s hair like that was especially cruel for someone already dealing with what sounds like some crippling social anxiety. And Your wife has now handed your daughter the perfect excuse for blowing this semester. She’ll be too embarrassed to go, then too far behind to catch up. It doesn’t sound like she was on a good track for success this semester anyway, but now she doesn’t have to own it - she can blame it on your wife. It’s going to set things back as far as getting her to take responsibility for her own success and choices.
I am so, so sorry you’re in the middle of all this drama. I’m glad you’re planning to take her to the salon and have let her know you have her back on this. In general, I always think it’s best when parents can present a united front. But when one parent crosses the line to something abusive, I’ve learned that it is important to name and validate that. Or our children start to lose faith in their own perception of reality, and feel like they have no place to turn for support.
Your daughter is going to have to come to terms with her own role in this, too. Trashing rooms, cutting bedsheets, and failing to go to class aren’t acceptable either. But you’re right that this was not an appropriate response on your wife’s part, and is only going to set things back that much farther with your daughter.
It might be time to consider cutting your losses on this semester, if that’s what your daughter wants or is going to do anyway. Can you get a partial refund? And maybe make a deal with your daughter that there will be no guilt over this semester if she agrees to see a counselor and make plans for her future? It sounds like it might be time to drop back and regroup.