Arguments for Moody being good:
* He was a true Auror: He dedicated his life to fighting against dark magic and was considered one of the best Aurors ever.
* He wanted to protect Harry: While his methods were often harsh and unorthodox, he genuinely believed Harry was in danger and wanted to protect him.
* He faced Voldemort: Moody was involved in multiple battles against Voldemort, showcasing his bravery and dedication.
Arguments for Moody being bad (or at least not entirely good):
* He was impersonated by Barty Crouch Jr.: The real Moody was captured and replaced by Barty Crouch Jr. who was a Death Eater in disguise. This means that most of the "Moody" we see in the book is actually an evil person.
* His teaching methods were extreme: While he claimed to prepare Harry for the dangers of the wizarding world, his teaching methods were often cruel and frightening.
* He manipulated Harry: He deliberately made Harry feel anxious and pressured, likely to make him more susceptible to Barty Crouch Jr.'s influence.
In conclusion:
While the real Alastor Moody was a good and courageous wizard, the character we see in "Goblet of Fire" is mostly the evil Barty Crouch Jr. in disguise.
Ultimately, the "goodness" or "badness" of Alastor Moody in the book depends on how much you believe his actions are actually his own. He is a deeply complex character, whose actions were driven by a mixture of genuine concern for Harry and a desire to serve the greater good, as well as the manipulative influence of Barty Crouch Jr.