I know for me that the more i rant and say "i can't do this any more" the deeper i get into my hole. The worse the depression gets. I'm not minimizing for sure because I KNOW how dreadful it gets.

You CAN get thru the next minute. Then after that you CAN get thru the next....and the next minute, and the next minute. I have to do that sometimes, just break up the day into minutes. One minute at a time.
One little task at a time. Sitting up in bed. Sitting on the side of the bed.
Putting feet on the floor. I CAN, I CAN, I CAN.

Move forward and don't try and analyze why you are in this place. Put your energy into moving forward, one little minute one little task at a time. Talk yourself into it. Just like you would a child...with love, with encouragement, with humor. You CAN do it.

Breathe, eat something good for you, give thanks for the day, for the moment.