I’ve come across more than a few attempted analyses of Mr. Trump. Yours is one the better ones. And true it is that we will never know for sure until he submits himself to a few professionals, which is unlikely.
I think we should acknowledge that we all lie in some continuum of mental illness. We all have some degree of depression, dementia, psychopathy, etc.
The question that should be asked is why did the electoral system put someone in a high position who seems to have a little too much mental illness to handle the job? To me, Mr. Trump assuming the presidency is a good sign that our electoral systems are failing.
I found it interesting your attempt (and others’) to psychoanalyze the more fervent Trump supporters, yet there is little understanding of the 50% or so of Americans who do not make the trip to the polls. For example, if Mr. Trump is as unfit as you suggest, then why couldn’t some of them find their way to the polls for the midterm elections? If 10% of that 50% had been so motivated, more senate seats (even in red states) would have flipped. But they didn’t. In other words, the midterm elections in 2018 was a victory for the Trump party.