One thing I have observed over and over again, is that when I lack assertiveness, because I am tired or something, then she feels like she needs to take over. And she does it very well. But it also creates a lot of anxiety in her.
What I am saying to OP, is that it's time to be more assertive. (1) There is more at play than the couple here; you can't just watch your children getting wrecked and do nothing. And (2), taking some ownership might actually fix the underlying issue.