The diagnostic criteria for occupational burnout are pretty well standardized and can easily be found online (e.g. https://www.thoracic.org/patients/patient-res

The diagnostic criteria for occupational burnout are pretty well standardized and can easily be found online (e.g. https://www.thoracic.org/patients/patient-resources/resources/burnout-syndrome.pdf https://www.thoracic.org/patients/patient-resources/resource...) and, based on my personal experience, are pretty accurate. What about these common lists of symptoms do you disagree with? You mention average hours worked per week being not unreasonable and not feeling you "deserve" to be labeled as burnt out, so I'll also note that, although severe overwork is a risk factor for burnout, it's only one of a variety of risk factors.