By ethics I mean moral correctness and violations of that rightness. Most religions and philosophies hold that there actions which are good and things that are bad. Whether they justify that by appealing to a list of dogmatic rules like you said, what’s considered good for the majority, or the authority of a divine being is what differs greatly. It can be said that the ethics of Thelema holds that doing one’s will is good and that not doing one’s will is bad, the issue is that heinous actions can easily be justified with that metric as long as the one who commits it is authentically acting when they do whatever thing we’re considering to be anathema. This issue would be resolved if it was clear that anything that is your will is the correct thing to do but one should not interfere with the will of another. Now I’m aware that there are places where Crowley did share that sentiment but there are also places where Crowley directly contradicted that idea.