What was your original impetus to start structuring your learning - was it because you felt like your improvement was plateauing, or because you had things you were interested in to keep track of?
That's when things became more deliberate in terms of focus, and I think in the process of doing that, is when things became more difficult to reason with.
But it's a catch-22. In the case of music, I felt demotivated making music, because it didn't sound like how I wanted to. But then focusing on study also demotivated me, because I wasn't making music and it felt like I was going off into another realm.