I'm sorry you're having a rough time right now!
I can't say I know where you're coming from with your having eczema and your allergy, but I know what you mean about not seeing a better future come along, and I'm around your age, too. It sounds like you're going through a lot right now and I don't think you sound spoiled at all for feeling like how you do. I wish I could say something that's actually helpful, and I'm sorry that I can't, but I just really hope you feel better soon and that things will look up for you in the future (I'm sure they will).