Did you register as a Democrat? If you did it proves a lot.
As I recall....People were changing parties to vote in the primaries. And people change all the time....
Some of us including Reagan were once Democrat in name only. In 1966 the child of a union person often didn’t know they could register any other way even if they didn’t support some Dem ideas. But then again so many Cruz people don’t believe people can change. Thankfully a God accepts people can change.
I remember my father apoplectic that I thought Goldwater was the best candidate in a history class where I was the only one to do so. That can leave an imprint.
My only choice would be Independent but I think here in Idaho I couldn't vote in the primary unless I party bounced.
I think your main point is that Trump is a chameleon and too much of a risk to be president. That's a valid point. I've given up hope on lifetime politicians that do squat but help themselves.
That said, it could end up being another election where I have to go hold my nose and color in the dot for the R.