The point of evil people is to take your time. By definition and consequence, an evil person is a person one ought not deal with. Evil is what one ought not do. It takes time to think and find what one ought do. Simply thinking about an evil person or evil is to think about what one ought not do. Simply getting you to engage with them in the way they wish an evil person has you engaged in evil, considering it as such. When one thinks about what one ought not do, one doesn’t think about what they ought do.
Evil people don’t want you to be happy. They want you to engage in evil, and thus lose and/or die, or they want you to engage their evil and thus absolve it, which allows it to spread and hurt more people as they lose their awareness of what is evil or not. Evil people want you to think they’re powerful. If you think evil people are powerful, that absolves their evil of being harmful, because then the evil action has power to make things as one wishes. As well, it suggests their actions can make you do as they wish or that one ought focus ones attention on them, in amazement or fear.
Evil seeks subordination of people. If one entertains the contradiction of evil being something one ought hold in some way, it contradicts the idea as such and the idea of morality as such. With the dissolution of morality, one does not have a guide to better and more meaningful existence. Evil does not seek the entertainment of its evil in particular as such, but the destruction of the person who would not entertain it. It’s not an affirming position evil wants, but a disaffirming position.
Why does evil exist then? Because death is an end that has no consequent event. It is final. So evil exists in a contradiction with itself. It seeks destruction, but its existence suggests it ought do everything otherwise. Thus, evil is a decaying state and not a final or total one.
It would not matter if you accepted the evil proposition. The consideration of the evil proposition destroyed your time thinking of the otherwise as such.