Loving yourself for your limitations (or in spite of them) would help. Self-worth is an inside job. You have to know you're still worth being alive and well even if nobody says you are. You're a good person and you have worth. If you can afford a therapist, you can work with them on that.

We can also support you with positive stuff, but you have to believe in it yourself. That's going to take some conscious effort in revising how you think and feel.