Jen,
I don't know if this will help but when my adult children are doing something that I don't like (and both are not making me particularly happy right now) I think about my relationship with my mother.
If I do something stupid at 52 it certainly has nothing to do with my mother at this point. My mother finished raising me many years ago and at this point I own my decisions ~ good and bad.
And so it continues with the next generation. I have finished raising my children. I did the best I could and tried to be a good role model. I taught them right from wrong and offered them tools they need to be successful.
Now, it's on them. Anything they do, right or wrong, good or bad, successful or not, depends on them.
Step back and let them live their lives. Shake your head and bite your lip but know that what they do at this point is a reflection on them ~ not you.
~Kathy