I'm so sorry you both had to go through that and that therapy hasn't worked for you.
A side thought - apologies if yes, but was cognitive behaviour therapy one of the therapies you tried?
https://www.nhs.uk/tests-and-treatments/cognitive-behavioural-therapy-cbt/
I used the basic principles of CBT (addressing how you think, feel and behave) on myself to go from 15 stone 6 to 12 stone.
I know my gain was partly perimenopause, partly how I felt after redundancy and unemployment, and partly habit.
Decide WHY you want to do this. Visualise yourself at your goal, how much better you'll feel, how pleased you'll be with your reflection, how your health and future will benefit - and remind yourself of that strong picture every time you're about to make an eating choice. Will that choice help me achieve that goal?
It can seem overwhelming, so look at your own habits and start by making small manageable changes. Mine included a pastry every morning with a cappuccino, so now I just have one on Saturdays.
Have a mindful breakfast instead so I don't feel like a snack.
Instead of pudding, always fruit. Yes there's sugar in it but there's also vitamins and fibre.
Small consistent changes in behaviour.
I went through the kitchen and disposed of anything that would not support us in it. Check yours out - if there are biscuits, crisps, cakes etc in there - get rid of them, observing how you feel about that. No, it's not a waste of money. It's an investment in your future. Donate them to a food bank (treats are fine).
Not being alone helped - my partner joined me in the weight loss journey. Joining groups may help - making positive friends who understand what it's like can in itself feel therapeutic.
Are you able to exercise? We walk a LOT more though I do wish I'd done weight training exercise throughout.
Value yourself - lovely body lotion, perfume, makeup, whatever makes you feel and look nice - you DESERVE it.
The practicalities:
Look at your plate - have 1/4 of it protein, 1/4 carbs, 1/2 mixed veg/salads.
Start calorie counting. The science works - eat less, eat better.
Have a food diary and write everything you eat, literally everything in it. Including cappuccinos, wine etc.
Make a chart and award yourself a gold star each time you lose anything. You could include your ideal weight loss at the bottom but if that feels overwhelming, do moving goals of three pounds, half a stone, one stone. Whatever feels manageable.
Only weigh in once a week. Take measurements and celebrate those as well as weight changing. And only if you find all that helpful and supportive.
Make all this habit; part of your daily practice just as much as brushing teeth, showering, dressing.
All the very best.