Thank you for sharing your experiences and for wanting to warn others so they are not taken advantage of. I feel your posting has a lot of value. Of course you are upset with them - I feel with good reason. Getting it out in the open will allow you to eventually be free from the bad taste in your mouth. Perhaps give yourself a time limit though. Establish a date after which you will no longer look back to the bad experiences you had and rather, look forward to where you can go from here to become a happy horsewoman who again looks forward to working with and being around her horses regardless of what others think or say. Pick a date and stick to it.
Like many, I could see right through PP way back in the early 80's when he was first making an appearance in the US. It didn't hurt that he was good "eye candy", but he spent more time hawking his wares than actually working with the horses during a clinic. It only got worse as time went on and I couldn't stomach the guy and his arrogant ego.
It is just the difference in human nature that some "see through" people much quicker than others. Everyone is different. I don't believe it is fair for others to judge you for not getting out sooner. There isn't one person who hasn't made mistakes themselves. The important thing is to learn from it and change our course as a result. It is good that at least you are done with PP now.
I find that it is also human nature to discount the validity of what someone in your position has to say. It is much like those who accuse the victim of abuse for being responsible for how they were treated. It is a very unfortunate reaction.
At the same time, I do believe that we are all responsible for our own actions and words. You are accepting responsibility for the fact that you stayed in longer than you ought to have. PP needs to accept responsibility for any misleading and/or unethical actions. Any of the current big-shot horse trainers need to do the same thing.
As in so many of the activities related to horses, from showing to training, to even boarding, it's all too often, All About the Money and rarely about the horses. It is up to us as horse owners to refocus the emphasis to being truly about what is best for the horse First.
Now go enjoy the search for methods that make more sense to you and utilize the valuable knowledge you gained from your experience. Use what you like and cast aside the rest. Listen to your little voice along the way. Best wishes to you as you move forward in a new direction.