Thanks for the post. We've seen a few stories similar to this. While I cannot make the promise of RNG protection being added to previous raids, I can say that we're bringing this feedback to the development team.
Additionally, Anarchy is planned to receive an increase to drop chances in a future update. Want to set proper expectations, it should match the change we made to One Thousand Voices, which is currently at a 10% chance.
Stay tuned for official patch notes in the case something changes between now and then.