I know what you mean, but we must NEVER give up. Good is MUCH stronger than evil, and to be alive is the work of Goodness itself.
Poor Muttly is "poor" for many reasons. Being disappointed is one of them.
...but he's getting better...!........
Godd and evil are balanced. If they are not, one would surely have prevailed voer the other by sheer attrition by this time.
I would even submit that one cannot exist without the other. No light without dark. No brilliance without a shadow.