I know someone with relatively bad eczema and I believe you when you say you believed you had nothing to live for. I’m genuinely glad you were relieved of that. It seems like it can be terrible to live with.
Yes, the worst was a period of months when I was effectively a burn victim (>70% of body with severe bleeding sores, and fully bedridden). The worst part was that, unlike with a burn victim, it wasn't clear to me if I would ever heal out of it.
Luckily it got a bit better to at least get out of bed, and then Dupixent came along a few years later.
It's really amazing how much the human mind adapts both upwards and downwards. These days I find myself sad about the same kinds of stuff as everyone around me (money, relationships, etc.), and I honestly don't think about where I was just ~6 years ago.
But in really down times, I do find it a mental panacea to just remind myself about my past which pretty much instantly solves any feelings of depression.