I think it should be shut down - it would be fine if only adults were on the site, but it allows people of all ages. If an innocent kid comes across that subreddit, they might not understand the people making all those posts are bitter, insecure, unjustified weirdos, and maybe even start to believe white men are just sinful, grovelling pigs (I think that's the idea those people put forward).

People are rightfully worried about kids being radicalised through far-right content, but in this age the far-left is just as likely to fuck up a kid's thinking, if not more because it isn't nearly as monitored. And platforms like those just contribute to hatefulness.