Thread:Mesektet/@comment-27729149-20160128170019/@comment-3581997-20160229092419

Yes. If you are looking for the TV Tropes articles on that it''s Jumping Off The Slippery Slope or He Who Fights Monsters, possibly even Woobie Destroyer Of Worlds.

Jumping Off The Slippery Slope- Reasons to turn out bad keep mounting up and eventually the character just indulges and goes full Evlols

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He Who Fights Monsters- Those who spend so much time fighting evil they become tone deaf to it and start doing evil themselves just to "keep the peace".

--- Woobie Destroyer Of Worlds- Someone is picked on/persecuted some much they decided the entire world is filled with their enemies and sets out to destroy them where ever possible.

Outside of TV Tropes and Idioms though that still occurs in many works. Just because a character develops does not mean that character is Good