First of all, keep in mind that the board moderators are free to manage their boards the way they want, as long as it does not contradict the MAIN rules or the interests of all board members.
If you have any issues with the moderator or the way a board is working, first of all, please try to contact the moderator and discuss this problem. Perhaps this is just some kind of misunderstanding or mistake. If you think that the moderators violate the platform rules or act contrary to the interests of the board members, you can report in on b/moderators.
In the case when moderators have lost contact with their board, you can ask MAIN administrators to add you to board moderators by posting on b/moderators.
If the board moderators still think that your posts do not fit their board, then you can always create your own board and manage it the way you want.
You can apply to create a board here.