“Sounds more like Satanism than Christianity. Satan tried to dethrone God.”
Hence the perversion of Christianity.
Satanism in its iconography and ceremonial and its philosophy/theology, is a deliberate inverse of, especially, Catholicism. Catholicism just has all the cool stuff that they want the opposite of, everything worth perverting.
I don’t think I have ever heard of “Protestant” Satanists.
That which is pointedly anti-Christian is not a perversion of Christianity. Communism is devoid of anything that even resembles Christianity.