Menslib on Reddit was one of the very few places I've seen thread that needle correctly. There are real issues that men experience and in fact you already named a few. Having a space to vent about how toxic masculinity makes it hard to connect with other humans because you're worried about your perception or how it may have lead to you suppressing your feelings for so long you no longer recognize them easily is a real boon to a lot of people. Having a space to celebrate amazing male icons who inspire others with their deeds is cool too.

The key is just making sure it's got the right moderation team to ensure that people don't point at easy scape goats for their problems and that we all acknowledge the complicated systems at play which often oppress us all. We need strong moderation to prevent those who have maladapted from preying on angry and hurt men. It's not an easy space because there's a strong history and culture of these spaces existing in toxic ways but that's only because of manipulation and not enough examples of how to do it right