So sorry you've been feeling this way. (((hugs))). I can relate. My depressions aren't always severe. They fluctuate...sometimes being mild, moderate, or severe. They can alternate in severity week by week or every few days too.
There was a period of time this year where I had mild to moderate depression. It felt so hard to kick....as if I wasn't ever going to be content ever again. I'm just starting to break through it all. Some of my depression lifted, although I have days lately where I am irritable and angry about situational stuff, along with a little hypo mixed in. I was giving up hope....but now I see a difference in myself. I guess treatment is working more than I thought; but I know it won't be my last bout of depression. I cycle, but I've been trying to accept things better.
I believe with time, this feeling can lift for you too, and things can get better. I know how hard it can be, but treatment, hope, and self-care can go a long way.