Hey wow, making strawmen is fun! They're so easy to demolish!
If only it was a straw man. Rejection of liberalism and its adjacent Enlightenment values/ideals is at the very core of the modern critical theories. It's written everywhere in the literature. Liberalism, debates and so on perpetuate inequities. I assume you are just not very familiar with this stuff.
Critical theorists just want to shut down any kind of debate whose conversation does not fit their worldview. I don't think we need examples here.
On the other hand, there are many opponents of critical theory that are genuinely interested in debate, and in comparing their worldview with different ideas.
Unfortunately, all I see is a page that wants me to sign up, so I can't yet say whether this site has an interesting approach towards making the above happen.
I don't see any technical way to enforce good faith in online discussion. At this point you can lose your job for saying something that was perfectly mainstream a year ago.
"It is impossible to design a system so perfect that no one needs to be good."