seems your wife is still unhappy with a lot of things within herself, maybe doesn't even know what it is exactly she is unhappy about. And what is the easiest thing to blame this discontent and unhappiness on? Your spouse of course.
Your frustration is loud and clear in your posts and after all your hard work YOU need to recharge your energy by finding something that gives YOU pleasure.
Have a think about what you were doing when she turned around to come back before. Can you start doing more of that again. I suspect you had detached quite a lot and were doing things for you and your daughter, rather than for your wife?