Twitch attire rules have no place in modern society.
You are experiencing a backlash regarding your nonsensical attire rules because you are so out of touch. Drop them, modern platforms must be the bastions of free expression and not support outrageous suppression of expression.
The only restriction necessary to comply with general law is that no one under the age of 18 is allowed to expose themselves in a ****** manner. You might try to restrict content to underage users but frankly, those users interested in such content will get it and it will not appeal to those not interested. Those interested in such content are merely expressing their own needs.
I am not sure what prompted you to decide to implement such draconian rules, but rest assure they are misguided at best.