Of all the games with a "play as the bad guy" premise The Witch and the Hundred Knight is the one that I feel that actually doesn't shy away from that. While here you don't control Metallia, the witch herself, you do obey to her every whim and that often means causing genuine harm to others.
When I first played this I was fully expecting Metallia to be a Satania like character, someone who tries to be evil but its actually a goofy dumbass, however I was pretty surprised when I saw that she's actually a nasty piece of work. Doing her bidding actually means actively making the world a worse place, while getting zero thanks for it.
Sadly that's pretty much where anything interesting about the game ends. Everything else is repetitive gameplay with an overly complex combo system that you don't really need to experiment with that much since the moment you find something that works you'll stick with it for a long time, until the game throws another type of enemy down the line and repeat the process.
I only recommend this if you're into overly complex combat systems, don't mind repetitive gameplay on bland dungeons, want to play the baddie and have a fetish for being dommed by evil witches.