I don’t totally agree with your assessment, but I can how it can be abused that way. The short answer is, I focus on the second, often forgotten half, of the Law. “Love is the Law, Love under Will.”
Do as thou Wilt is much more complex than the Satanist, do as thou will. Crowley is talking about doing your True Will, and taking the time to find it. I believe if you find your True Will, you will be at harmony with the universe.
That all said, I am not a Thelemite, because I do take umbrage with some of Crowley’s own interpretations of the Law.