It’s not the people who disappoint you.
Everybody does his best, whatever best looks like.
Disappointment comes when you can’t accept the mismatch between their actions, and your expectations.
When such a mismatch happens, we can either blame others, for something which already happened, and that we can’t change anyway,
Or we can decide to accept the result, and take action according to where we want to go from there.
100% accountability always works better than looking for someone to blame.
There are no winners among complainers.