/MSG/
Uwaa OmO
You only tend to think acts of good are far more common, because it is a tendency to dwell on that which is good rather than bad. And because of this you are more likely to focus on good when you see it. Evil (or bad, which ever you prefer) is often far more subtle.God and evil have no meaning to the universe. They are properties that only have subjective meaning only to human beings (although there are probably parallels amongst the animal kingdom). Good and evil are not physical forces.
Acts of good are obviously far more common than acts of evil, and acts of good do not in any way, shape, or form require acts of evil. A world in which acts of good and evil were "balanced" would simply descend into anarchy. Humanity would not have survived as long as it has.
Further, the idea of balance is nothing more than en extension of the idea that every action has an equal and opposite reaction. You're trying to hard to apply said formula to a deity and subsequently deny said deity. It's not that grand or complex.
For example, if I were to punch you in the nose several things would happen. I would derive joy from this, therefore the act has good. You however would derive pain, thus the act is also bad. Already we have balance, but we haven't had the reaction. What that reaction would be, I cannot say. You might punch me back, causing me pain (bad) and you feeling as though you've gotten even. Or you might just take the punch, and a later encounter, say I needed to borrow money, would result in me not getting what I wanted (bad) and you relishing in denying me a need (good).