Whinge whinge. Let me tell you a little secret, in the last 2ish weeks I've dropped about 5 or 6kg simply by imposing a semi-diet on myself... what do I imposed? No food after 6PM. I actually only adhered to it about 4 days per week. I now weigh exactly 80kg, which is pretty much my standard normal weight. I have a great fear that if I put on more than 5 or 6 kilo that I won't fit into any of my clothes. Hence every so often I do this "diet". I still eat greasy takeaway all the time. Why don't I go on a real diet? Because I know this works. Now what "works" for you Ben in your situation is frankly none of my business; but you're not going to find it if you don't try different things and find something that works. Antidepressant pills don't cure depression, they just take the edge off.
Again I refer to your statement "my situation far surpasses cookie-cutter depression" - is that just a reason for you to believe that there's nothing to be done about your particular persistent depression? "Eh, stop trying to be my therapist." Whateva, you're a big boy you should be able to take care of yourself.