Why are you trying to staying neutral? A good friend has a responsibility to speak up when they see something that they think is likely to hurt their friend. You don't owe the crappy therapist anything. Expressing concern for a concerning situation does not need to involve any sentiment along the lines of "I told you so." It doesn't matter whether you were right or wrong that something is up with this T. Your job as a friend is to be kind and supportive and direct about something you see that seems off in your friend's life. Once you've done that, you're free to back off and let your friend do whatever they're going to do.