Because it represents everything we hate about feminism. I recently made a account and it was off to a great start. I loved some forums I saw and would regularly post but then I decided to make a post about biology and gynocentrism and then the admins and other users attacked me calling me a mangina and a tuna. Later on, I was blocked and my account was deactivated with the admin spreading lies about me. It represents feminism in these ways:

1. In the same fashion that feminists cry "patriarchy" when met with a different opinion, mgtow.com users cry "tuna" and "mangina" in the same fashion
2. They refuse to recognize biological realities just like feminists do when they refuse to admit why men dominate STEM
3. They block and destroy anyone who calls them out on this behavior

I'm writing this to new mgtows and old to stay away from this site. I recommend continuing to use reddit and mgtow alternatives instead of this disasterous shit hole.