How do people with mental health issues manage major life challenges? Especially when they come one after another after another?

My life has been this way for about ten years now -- no joke. It's been one major challenge after another, for years! I also deal with periodic depression and PTSD and more frequently, anxiety.

I have come to a point where I don't think I am coping well, and I think I am shirking away from facing the challenges at present. I am trying to avoid a depression episode, but I feel it slowly creeping up on me. All I want to do is lay down, watch TV and avoid the issues. I am at a point of avoidance rather than facing the challenges head on.

I am tired of the constant battle. I am worn out. I feel I have little fight left in me.

So, does anyone have any advice on how to manage life difficulties on top of mental health issues, when it's already been too many battles???

How does one solider on in life, when one is SO burnt out from the constant battle??