I don't suggest avoidances from anything simply bc of your stuttering but I agree upon your discontents with toxic positivity on this sub. But first, you can web-socialize with others which is also preferred by me and that can avoid entire dissociation which is nearly impossible and extremely unhealthy to yourself, secondly what is the point of immersing yourself into limitless negativity then? Can it mitigate your stuttering? Ofc no, thirdly it is more worthy of time and effort to find ways that can at least mitigate your stuttering on this sub, books, therapies, etc., better than just purely dissociating after all, finally it's always a good rule of thumb to just not gaf about those who discriminate your stuttering and tell yourself they don't deserve you since stuttering is not your fault at all. Also remember your stuttering comrades are good materials to socialize, for example I suggest joining the discord, and if you find anyone who fit with you well, why not befriend him/her?