{ 1 } - Yes completely -- Aristotle gave the last word on the subject.
{ 2 } - Aristotle was right in his description of natural happiness, but there's also a more complete supernatural happiness that we learn about from Christianity.
{ 3 } - No -- Aristotle was totally wrong.

Natural happiness, as described by Aristotle, can bring us a degree of fulfillment. But beyond this is a greater supernatural happiness, which consists in the contemplation of God (the beatific vision) in the afterlife.

What makes an action bad, ultimately, is that it moves us away from our ultimate goal, which is complete happiness in God. To orient ourselves toward God, we need more than just natural virtues like wisdom, justice, self-control, and courage; we also need faith, hope, and love.