I didn't know about Voat, sad that it was closed down. I would have loved to try it.

>The intolerant views take over.

This sounds to me like a you problem. You can very well admit that you don't know how to argue and shout back (in whatever style necessary to win), or that your views are so unpopular that you can't defend them unless to a supportive audience, but don't make this some sort of universal law or inevitable tendency. There is nothing about any view that makes it inherently more popular or appealing.

>a cesspit of intolerance.

This usage of 'intolerance' hints that you don't really understand Popper's sense of the word. Popper wasn't talking about what offends you, Popper was talking about people violently forcing you out of a society. There is no intolerance on 4chan or 8chan or any similar platform, literally everyone is allowed there, everyone is just an anonymous unique number. Only your own offence prevents you from participating, which is not anybody's fault. Every single "bad" tech platform, the ones that allow speech that mainstream progressive-dominated US companies love to rave about, only suffer due to external pressures imposed on them, the audience of those services very much like it, and they don't seem to physically force reality or other people to like what they like. The only one doing the forcing here are the self-appointed tolerance defenders, who are so so worried about tolerance that they are willing to freely dispence intolerance left and right to protect it. It's like how pro-war folks say that war protects and preserves the peace: It's indeed very true in a certain narrow sense, but you can't be doing it willy nilly, or you will risk destroying the very thing you claim you want to preserve.

I also don't understand why defending unlimited expresssion of views must imply defending unlimited expression of view without moderation. There is no reason why we can't moderate any ideology at all, see the subreddit r/themotte for example to see a place where everyone from radical feminists to white nationalists expressing their views in moderated threads.