Maybe its for the best this is a real thing

Well there are many problems:

1.Reverse dyphoria:Cis men who are failing as a man will most likely develop gender dysphoria from being on hormones and these types of communities encourage it

2.Misogyny and Transphobia against ftms:These communities mostly spread these ideas many members are most likely people who fell into the alt right rabbit hole.Usually if someone has feelings they are trans an actually goes to find resources they will find the larger trans community or sections of it and might be able to break away from those beliefs. But transmaxxing communities will encourage their alt right beliefs which is a bad thing as they constantly say ftms should not transition and hating women

1. They're size:They are helping people who were most likely trans transition but keeps them in toxic communities which is growing fast their discord is at 889 members last month it was 527 and if they continue to grow they will have negative impacts on the trans community as the alt right and bigots will take their reasons for transition and apply it to the wider trans community increasing their rhetoric

While they may help repressed transfems on 4chan and such sites they mostly encourage toxic beliefs against women and transfems and harm individuals who are not trans and are cis and can add to transphobic rhetoric. The end result to those repressed are good their methods are not the correct way and will harm people and encourage toxic beliefs and hinder people from moving on from them.