Hello! The future, when you’re 30 might actually be better, or not better. We can’t really tell. What you can do is improve on the now.
Though our events are different, I understand your frustration and pain. You’re trying to recover then bam! Another problem comes along. A couple of years ago, my therapist told me to do little things that prove that I am capable, to make me feel empowered when I feel helpless. It’s not a quick fix but it helped me boost my mood even for tiny bit. This might be drawing, cooking a meal, just anything to start to make me feel not worthless even for a brief moment of the day. What activity are you good at?

The more general advice is to exercise to release those happy hormones.