When I was in your situation I knew what I was doing was unhealthy and unsustainable, and I'm sure you do too. I don't think you're stupid or unreasonable, and I don't think you're in a position where a professional would convince you to change either. They wouldn't have convinced me. Its going to take me a long time to to get better, but I really do hope that you'd be open to feeling better, even if you don't want to increase your calories right now.
Please don't take this as the end all be all fix, but I felt infinitely better when I shifted out of an all (24hr fasts, less than 1k calories or whatever I saw other people say worked) or nothing mindset and followed a sort of intermittent fasting type diet. It let me binge less on junk when I knew I was waiting until 2pm for my planned/filling lunch. I was getting better nutrients/more protein and feeling so much less guilt overall.
You didn't mention it explicitly, but if you binge drink I'm gonna guess you probably purge in some way. Obviously don't give yourself alcohol poisoning to avoid puking, but if you're vomiting otherwise or abusing any sort of laxative, do literally anything you can not to purge. It will **** you up forever. Your teeth your stomach your colon etc. I think the leftovers of purging are worse for me than the actual residual body image issues. You're not doomed by this. But be kind to your teeth when you can. Don't go over recommended dosages.
I'm not sure to what extent you're in ana/mia circles online but you did mention it. I found it comforting in a lot of ways to see people sicker than me and I get the desire to treat it like a weight watchers advice group. Looking back it did tank my self esteem and had basically no effect on my weight. If you can, try to make it harder to access in some way. (Ex Only use the web versions of apps you look at pro ana content on or log out of accounts manually and unsaved your passwords). It makes you think more about what you're seeing and kinda breaks the habit.
I'll hope you try at least some of this just for harm reduction. It's only anecdotal, but none of these were steps I actually took toward gaining weight or fixing my diet, just things I did to feel less awful some of the time.