He failed the abramelon ritual or whatever its called, because he didnt want to finish it, then started his own makeshift cult which accomplished nothing and ended with all its members leaving with hardcore mental disorders.
i guess his saying "do what thou wilt" must sound pretty cool to whoever thinks this guy accomplished anything of value.
Only failed ones do. Personally I think the whole cult of Crow is another great 3-letter PsyOp, esp. When you consider his and his later followers intelligence ties.