This doesn’t sound like failure to me, it sounds like the normal consequences of your life becoming busier. Of course it is hard to resume those habits, especially if your life is still stressful and busy.
Maybe we should consider our own limits and be more accepting of why we might fall into bad habits. This obsession with balance and productivity does a lot of damage.
As a final point, everyone has a different tolerance for stress and productivity. But western morals assume all people are equal and any failing are thus a moral failure. This harms those of us who, through random environment + genetics have different strengths and weaknesses. Many ADHDers go through life thinking of themselves as shit people because they can never even get close to the moral standard of balance.