You sound incredibly invalidated with how you've been treated, and I'm sorry that's been your experience. That does suck.
All I can say is, how does this resentment serve you? Does acting on this resentment and on their failings and assuming that is how it is with every service provider you will encounter serve you positively? Does it help you?
You want help from services, right? It sounds very much like you do. Which, if you do, you may have to set aside some of those feelings and set aside some of that baggage if you want to move forward in a positive direction. Focusing on their failings and what previous teams have done doesn't help you currently. If previous teams have been helpful, or previous services have been helpful, communicate that to what you have now.
I'm stepping away, but I hope you can get what it is you need.