I'm hoping you don't mean the people here!

I'm sure you don't
'Nothing but bitterness from people who have this disorder' is a bit harsh if you include the folk here! These threads contain a wealth of positive, supportive, informative and kind comments towards those who are going through a tough patch and need the help.
Speaking only for what I've experienced here

I think there are very few bitter people on this forum, and an awful lot of amazing and inspirational people who quietly fight against the limitations of this disease every day, and strive to keep the life they have - and to regain any tiny part of what they have lost. They are all brave and strong, even if they don't realise it.
We all have low points, and times when we do feel angry or frustrated at the effects this has on us, but it doesn't make us bitter people. Just decent, loving, kind, hard working people who are going through a crappy time and reaching out...
Bram