According to this new piece, it sounds like Maria has wanted to leave Arnold for quite some time.
I’m not a psychologist, but from this piece, it sounds like Arnold suffers from narcissistic personality disorder (NPD). These persons so afficted are very difficult to live with and there is no cure for this problem. It can only be “managed,” usually unsuccessfully as the sufferer cannot help themselves and see nothing wrong with themselves or the way they treat people :={
