Anger at other bereaved - is it ok?

Ok, this might be hard to understand. I'm angry at other people on a forum I use. We have all lost a close family member, but most are 20-30 yrs older than me. However, they all make a far bigger deal about it. I'm not saying it's not a big deal, believe me, it turned my life upside down, but I have lost more since then, and even though I'm a lot younger than they are, I'm not completely self-obsessed. They literally think their bereavement is the ONLY thing in the world, that nobody is worse off than them. I know firsthand, the intensity of grief, coupled with depression, but how can they be so selfish?? One woman even said she would have traded someone else's relative so that hers could have lived. How can she even think that? Is it ok that this makes me angry??