I understand they hurt you. And that you think the legal people would not steer you wrong. I think if you saw this from another point of view you would see it is more vindictive than actually wanting to prove anything or get your job back. You've moved on to something better, let it go.

I have a hell of a lot of experience with horses, therapy barns, volunteer jobs and volunteer work. I could address every point you have raised but I am on my phone and perhaps you'd like to do it privately as I can use real world examples for you to see.

Generally when you try and take down a place that is widely seen as helpful (regardless of if you and a couple others do not), especially when your case is based on mental health - you are not coming out on top.

I am sorry to say as I know how hard it is to be hurt by these places.