In as much as things can never be as bad as the worst, the expectations we may have to be better than the best are counter intuitive.
The same cognitive exercises we use to examine the negative perceptions of how things impact us can and should be applied to our achievements or our work on a daily scale.
We need to be easy on ourselves. Understand our limits. Set reasonable goals and expectations for ourselves and for others.
Then we can be satisfied that the actions we have taken for ourselves and others are the best efforts we can put forth as individuals and no one can take that away from us or question our efforts.