There is always someone worse...it does not mean that your situation is not hard to you.
I have struggled a lot with this all through my life and since becoming a mum. I have it so easy compared to lots of people ... why do I deserve what I have when other people have so little? I guess in that regard, I have learned to stop comparing myself. I have learned that I have the strength to get through what I need to, when I need to. I need to be grateful for what I have because of what I have not because of what others do or don't have and when I find it difficult, that's okay too.