Point 3) When creating a Good Villain, the author can give their character all the dreadful determination that in every day life we keep leashed.
For example, when rage raises its ugly presence we can wish evil upon someone. What makes us reasonable people is that we do not carry out our wishes.
We can though, have a villain take their worst intentions to heart and act on them. Where a reasonable soul would rage and then simmer, finally allowing logic to rule their lives, our antagonist can take their rage and act on it. Even to over react and devise and enact those dastardly deeds that will keep the reader hoping justice is finally served. When the villain takes payback and revenge too far, when they fail to keep within limits of behaviour that are reasonable, that’s when their behaviour becomes villainous and dastardly.
An example of a villain whose actions are malicious and whose diabolical plan keeps the reader hoping for retribution is the arch villain in the Chronicles of Caleath. Throughout the series, readers keep asking if and when will the hero finally defeat/meet his nemesis. I take that as a sign of having created a great ‘bad guy’.