Obscure image/text boards not well known, I'll start:
thatfeelwhen.net - Similiar to Wizchan, text only based board for virgins. Roughly about 3 or 4 posters including the schizophrenic paranoid admin who stalks you. I may or may have not been banned here.
Crystal.Cafe/lolcow.farms - Imageboards for "women", but most likely filled with troons who are misandrists.
Wizchan.org - Imageboard for recluse virgins. Depressing as hell and kind of a slow board. Staff there are ban hammer trigger happy, be careful.
alogs.space - I visit this place for lolcow information, other than that idk
tvch.moe - autists posting about big cock ramon everyday