That's the point; he's not a full blown villain, he's on the knife edge of evil and good. He wants strength, but he feels he only has strength when he's evil, and he resents the pull of the light side of the force because of this.
He still wants Anakin's lightsaber, and he knew he had to kill his father despite stalling for 5 minutes. He couldn't even use dark side powers in his final fight without smacking his wound repeatedly for the pain.>>91902318
Not that hard. Armenia took like 5 years to completely obscure to the general public until later on, Holocaust deniers came out of the woodwork within 10 years, and the Jedi mainly only existed within a temple in a singular city, with religious/farming/research outposts scattered around the galaxy.>>91902273
I can genuinely see this.