But the better thing by far would be to try to move past the blame, and instead start asking the question: Why did God give you this problem?
For sure, He's not just doing it to punish you or ruin your life (although it can often feel that way sometimes.) But fundamentally, God gave you all the tools you need to achieve your unique spiritual mission in life.
Every single one of us has 'negatives' in life, some more obvious than others. I've found in my own life that so far, every single 'negative' I thought I had was actually a doorway to a profound 'positive', but I often had to work very hard, pray a lot, and have a lot of patience until I started figuring out what the 'upside' was.
But so far, I've found it every single time, even in my most challenging issues and problems.
Your physical health may be weak, but you undoubtedly have a lot of abilities, aptitudes and talents that other people who are stronger don't have. What are they? And how can you use them to build the world in your own unique way, and to become the truly amazing person God intended you to be?
Once you start to look for the answers to those questions, you'll feel a whole lot better about your life circumstances, and you'll probably also see a whole bunch of new doors and opportunities open for you.