If she'd said X has to stop from now on, or could you do Y for me please, then I really would have took on board what she said. That is the most frustrating part - the things that are broken are easily fixable but she won't give me the chance to show her that.
This ^^^ is what I'm talking about, Alpha. This ^^^ is unhealthy co-dependency. You don't make the self-improvements in your life for HER, you do them for YOU and for your kids, and to build yourself up into a much better partner for the next woman down the road. And if in so doing, it re-attracts your wife back? Well then, BONUS.
I guarantee you that your wife smells this fear and co-dependency, this "just tell me what to do, and I'll do it!!!" It's literally repulsive to her, I can assure you. She would much rather see a man that stands up for his own beliefs, passions and interests, and says "I'd still love for you to share these with me, but if not . . . I realize I'll be okay and the kids will be too and we've got a wonderful life."