I've had a revelation these last couple of months, my son got diagnosed with ADHD and I saw many of the traits in him that I also exhibit, so I thought, you know what, why live life harder than it needs to be if I have a real condition.
Got off to get myself diagnosed and the biggest surprise is that my depression seems to have lifted. I had no idea how much of a cloud I was living in before but I feel like living now instead of just going through the motions of "being alive until I die"
Definitely not giving advice as to any specific treatment here but perhaps it's worth exploring a bunch of options as it might be a chemical imbalance of some sort.
Now that that's been fixed I can do what the other "helpful" people are suggesting about eating right and exercising, before that it was just bullshit advice.