This is a non-starter of a mission. The Commission cannot be sued for failing to act on your complaint in a particular way. By statute the Commission has discretion and is required to exercise the discretion. If the Commission could be sued to compel a particular result, then there would be no need for the Commission at all. It would be nothing more than a rubber stamp for every complainant.
The U S legal system does not promise a just result in every case. It promises access to legal process to address your claim. You have had that and you are now at the end of the road.
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