Eating disorders which binge eating is are quite complex. I think you need to find your triggers for eating all the 'junk' food and ask what's going on in your mind at that moment. It might be boredom, low self esteem, even self-hate and a kind of self-abuse. Or you may be unhappy with your work or a relationship and doing some comfort eating.
Does any of this ring a bell?
Most people love the stuff you binge on, but people who are not overweight and don't have an eating issue know that the 'pain' of overeating is worse than moderating their intake.
You need to learn to love healthy food which isn't 'dieting. If you have 3 good healthy meals a day and the occasional treat (once a week or so as a small portion) that is the way to go.
Fill your plate with foods like lean meat, fish, eggs, loads of veg and fruit, and keep off things like pizza, white rice, white pasta, white bread, cakes, biscuits, crisps etc
I'd suggest you go back to the 5:2 regime or the 800 cals a day for 2 weeks to kick stat some loss, then rejig your diet so you eat well 80% of the time,
But you do need to work out why you are taking comfort in food only to hate yourself for it later. what's going on do you think?