Most productivity advice is written by and for people with long uninterrupted mornings. If your job is answering other people, that advice does not fail because you lack discipline — it fails because it was never aimed at your day.
The focus score weighs meeting load against uninterrupted hours. It is a rough signal, not a verdict: two meetings and five focus hours is a protected day, six meetings and one focus hour is a fragmented one, whatever the calendar claims.
Change one habit at a time and keep it for two weeks. Stacking five new systems at once is the most reliable way to end up back where you started, minus the enthusiasm.