Well that sounds unbelievably shit!
I’m sorry they were so useless. Especially the one crying about your story. No use whatsoever at least until well into the therapeutic relationship where a small degree of showing genuine empathic emotional response can be helpful.
Have you had EMDR OP? It’s a different way of processing trauma that doesn’t rely on endlessly talking about the past to process it.
The other thing is have you read the Body Keeps the Score. It contains a huge amount of information about more body based therapies. In my experience there isn’t usually just one way in which people can process past trauma. Usually a combined approach is helpful. For example something like somatic experiencing or EFT tapping or parts based work like Internal Family Systems combined together can be really helpful. Also doing some mindful exercise like yoga, t’ai chi or Pilates can also help.
There’s also a group based therapy called PBSP which has helped people with very severe trauma.
Another person who gives a huge amount of information about trauma is Carolyn Spring. You might want to read her web site.
If your trauma came from childhood experiences then Pete Walker’s book From Surviving to Thriving is very good.
Finally you might find the work of Peter Levine, Babette Rothschild and Deb Dana on YouTube and their written work really inspiring. There are many practical ways you can use at home to bring down your level of emotional overload in a healthier long term way than overeating. For example you may be stuck in a constant flight or flight state and it’s important to start to feel a place of safety before you process your trauma otherwise it could be overwhelming.
These are just some ideas for you but obviously you will find your own way forward. I wish you well. As you realise yourself it is really hard to tackle your emotional eating without first processing the underlying trauma. I’m so sorry that happened to you,