I am "evaluating" him as someone who feels he has come unglued in a similarly severe but less public way and recognises a fellow traveller. I'm fully entitled to say this, am I not? It's just my opinion.

I am not "medicalising" it — not least because the medical profession does not recognise burnout as mental illness (because it gets it backward and assumes it is an occupational health issue).

I am saying he is, to me, evidently mentally ill in the way I feel I have been mentally ill. I wouldn't accept a doctor telling me my problems are work stress.

"His job performance was suffering and he appeared to be stressed" is IMO classic American-influenced minimisation of middle-aged male mental ill-health. I would be shocked if what is going on is in any meaningful way limited to his "job performance" and that apart from the job everything else is going fine.