Certainly not from humanity. If anything, there is no more reliable a source of disappointment and betrayal than humanity.
Perhaps this isn't so much hope but more akin to strength. The fact that life on Earth has survived multiple mass extinction events does put things into perspective for me. Whatever problem I have, it is quite nothing compared to the utter calamity this planet has witnessed. Life had to be tough. So should I.
Life on Earth has always been brutal and unforgiving. If not from disease, predators, parasites and natural disasters, then surely from other individuals in your species. Ultimately, humanity is just another expression of nature's unbridled brutality and indifference.