There are subtle forms of abandonment, that's true. Still, what you have described seems to be outright client abandonment, which is covered by codes (depending on the state and type of T).

If you suffered, felt it as distress, already had issues with abandonment that your T knew about, then it can't be so easily dismissed.

Have you considered an advocate? or checking out the codes where you are? It's a drag to report, but if this T did this to you, then others might have the same thing happen. Reporting the T is not revenge; it's protecting yourself and others from mistreatment. Just thinking aloud.