I'm an Evil Dragon! Not a Wise King

Once he traveled through time and became the evil dragon Fafnir, he was born to be the most evil villain in the world. Fafnir had no intention of changing his ending. He wanted to carry out violence and extreme evil in his lifetime and become the most evil dragon. "Haha! Feel the terror, humans! You will bear the pain of being enslaved!" "Great evil dragon Fafnir... How are you going to enslave us?" "From now on, you will have to work ten hours a day. Humans who work for the construction of the territory will only be provided with three meals and snacks a day. You can only have two days off a week. You can only enjoy psychological therapy once a month. You can only have a two-hour lunch break. Your salary will only be raised once a year, and bonuses will be given up to three times a year! You will be squeezed to death by me, the evil dragon Fafnir!" "What! Will we no longer be enslaved by nobles and kings... You are not an evil dragon! You are a wise king! Our eternal monarch!" "?" Fafnir couldn't understand that people like him would be criticized as exploiters in the original world. At best, he was a little soft-hearted and only thought about sustainable development. Why did he become a wise king here? Aren't you an evil dragon?