[Goldar's Revenge]

The spell made Kat act on her jealousy. Also the cyber equipment made Karone act on her ambition. Specter's plan worked out way too well. The device most likely made her hate the Rangers as well to replace her new found love and friendship she developed as Karone.

Tommy may have turned on Kimberly but only because his direct mission was to destroy the Power Rangers. The spell may have worked different but it doesn't make Tommy any more good than Kat. Also the Sword of darkness already strengthen the spell by that point. Its likely Tommy would have broken the original spell without the sword. But so did Kat, so you can't use that either.

Now if you want to say you don't like Kat and Karone, that's different. I would disagree but you have the right to your opinion. But saying there evil just doesn't measure up with the facts objectively. And to be frank, feels you being influenced by you're dislike for the characters. If not you would be saying Tommy was evil too.